NEW DELHI, Aug 11: Supreme Court on Tuesday ruled that Aadhar card is not mandatory for the citizens.A Constitution Bench of the Supreme Court further instructed the Centre to publicize the decision widely. The Centre shall ensure wide publicity through print and electronic media that Aadhar card is not mandatory, the bench said.The Constitution Bench was hearing a batch of petitions challenging the Centre's ambitious scheme to provide Aadhar card to all citizens and decide whether right to privacy is a fundamental right.The Constitution Bench ruled that Aadhar card will remain optional for availing various welfare schemes of the Government except for PDS and LPG distribution system.(Agencies)