The Supreme Court on Friday decided to examine the constitutional validity of the central government's decision to link the Aadhaar card with the Pan card.

A bench of Justice A.K. Sikri and Justice Ashok Bhushan took the decision even as Attorney General Mukul Rohatgi stoutly defended the government.

Senior counsel Shyam Divan and Arvind Datar, appearing for the petitioners, including a former judge of Karnataka High Court, said it was extremely difficult to follow the rule as many people did not have an Aadhaar card.

There was also constant mismatch of individual details in the two identity cards.