I want to collect ID card number for any 4 listed ID cards available to the respondents but each of the cards has different number of digits

[Kal_Lam]

Welcome to the community @Bilqis! You could do this as outlined in our support article Restricting Text Responses With Regular Expressions. As a sample workaround you could also have a look to the following community post discussed previously.

This post discussed previously should be very relevant to solve your issue:

Restrict for Entering 10, 13 OR 17 digit number only

Try changing the above to either of the two Option 1 regex(., ‘^[0-9]{10}$’) or regex(., ‘^[0-9]{13}$’) or regex(., ‘^[0-9]{17}$’) Option 2 regex(., ‘^([0-9]{10}|[0-9]{13}|[0-9]{17})$’)