Want to Show and hide choice options from a variable in Catalog item

[diptishade2]

I am working on a requirement in which we have one catalog item and inside this we have a field named 'Please select the category of task completed '(select box type). This field contains options such as Account Driver Support ,Diary Management , Documents ,Email Management ,Events ,Expenses ,Finance Support,
New to firm SH onboarding , Project Management , Salesforce ,SH 121 meeting ,SH meeting/Management,
SH Tech Support ,Social Media Support ,Timesheets ,Travel. 

Now as per the requirement provided we have seven groups in total. Out of those 5 groups ( Tech A, Tech B, Tech C , Tech D , Tech E)who have full access to the variable stated above and other two groups(L1 and L2) can view limited options from the list above.

For this I have created a Script Include and an On-load Client script .

Script Include:

var SolhubGroupUtils = Class.create();

SolhubGroupUtils.prototype = Object.extendsObject(AbstractAjaxProcessor, {

    isCurrentUserInGroup: function() {

        try {

            var groupSysId = this.getParameter('sysparm_group');

            if (!groupSysId)

                return 'false';

            var userSysId = gs.getUserID();

            if (!userSysId)

                return 'false';

            var gr = new GlideRecord('sys_user_grmember');

            gr.addQuery('user', userSysId);

            gr.addQuery('group', groupSysId);

            gr.setLimit(1);

            gr.query();

            return gr.hasNext() ? 'true' : 'false';

        } catch (e) {

            gs.error('SolhubGroupUtils.isCurrentUserInGroup error: ' + e);

            return 'false';

        }

    },

    type: 'SolhubGroupUtils'

});

And the On-Load Script :

function onLoad() {

    // --- CONFIGURATION ---

    var fullAccessGroups = [

        'd8e497043bcfba90e944d59a04e45abb',

        'ff189f4c3bcfba90e944d59a04e45a6a',

        '258d5b8c3b03fa90e944d59a04e45acf',

        '81792f803bc3fa90e944d59a04e45a44',

        '0d2ae7043bc3fa90e944d59a04e45af7'

    ];

    var restrictedGroups = [

        'd6afa2f52bc57a103b70fef56e91bfe1',

        'f06a9fd42bd9ae103b70fef56e91bf43'

    ];

    var changeTypeVar = 'please_select_a_category_of_task_completed'; // field name

    var fullList = [

        'account_driver', 'diary_management', 'documents', 'email_management',

        'events', 'expenses', 'finance_support', 'new_firm', 'project_management',

        'salesforce', 'sh_meeting', 'sh_management', 'tech_support', 'social_media',

        'timesheets', 'travel'

    ];

    var restrictedAllowed = [

        'travel', 'events', 'salesforce', 'tech_support',

        'documents', 'sh_management', 'sh_meeting', 'new_firm'

    ];

    // Combine all groups to check membership

    var allGroups = fullAccessGroups.concat(restrictedGroups);

    // --- AJAX CALL TO CHECK USER GROUPS ---

    var ga = new GlideAjax('SolhubGroupUtils');

    ga.addParam('sysparm_name', 'getUserMatchingGroups');

    ga.addParam('sysparm_groups', allGroups.join(','));

    ga.getXMLAnswer(function(answer) {

        if (!answer) {

            removeAllOptions();

            return;

        }

        var userGroups = answer.split(',');

        var hasFullAccess = userGroups.some(function(g) {

            return fullAccessGroups.indexOf(g) !== -1;

        });

        var hasRestrictedAccess = userGroups.some(function(g) {

            return restrictedGroups.indexOf(g) !== -1;

        });

        if (hasFullAccess) {

            // Full access: show all options, do nothing

            return;

        }

        if (hasRestrictedAccess) {

            // Restricted access: remove options not allowed

            fullList.forEach(function(option) {

                if (restrictedAllowed.indexOf(option) === -1) {

                    g_form.removeOption(changeTypeVar, option);

                }

            });

            return;

        }

        // No access: remove all options

        removeAllOptions();

    });

    // --- HELPER FUNCTION TO REMOVE ALL OPTIONS ---

    function removeAllOptions() {

        fullList.forEach(function(option) {

            g_form.removeOption(changeTypeVar, option);

        });

    }

}

But the script isn't working . Please help me out on this please at the earliest and please provide the correct code snippet to achieve the functionality stated above.