Hi @MaidhiliL 

client script to make a choice field mandatory:

For `onLoad` Client Script:
function onLoad() {
g_form.setMandatory('your_choice_field', true);
}

For `onChange` Client Script:
function onChange(control, oldValue, newValue) {
if (newValue === 'some_value') { // Adjust condition as needed
g_form.setMandatory('your_choice_field', true);
} else {
g_form.setMandatory('your_choice_field', false);
}
}

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Replace `'your_choice_field'` with the actual field name and adjust the condition as needed.