We do not have sufficient information to reset your security questions.

Hello raviramani,

Since you are getting a 'not sufficient information' message, realize that several years ago Apple transitioned to using to two factor authentication instead of security questions. Apple has been encouraging users to switch to the newer security system, two factor authentication. Your next recourse will be try to change to two factor authentication as outlined in this article -->

Two-factor authentication for Apple ID - Apple Support

Follow the instructions in the section "Turn on two-factor authentication for your Apple ID"

If you still have problems then contact Apple for help with Apple ID account security using the information in this document --> Contact Apple for help with Apple ID account security - Apple Support

Contact apple support to regain access to your account