Chennai: Slamming senior Central Ministers for defending Home Minister P Chidambaram on the 2G issue, Janata Party president Subramanian Swamy on Thursday said they were "ignorant" that Government policy cannot be arbitrary or malafide.

"There are at least a dozen Supreme Court judgements which make clear the Government policy cannot be arbitrary, unreasonable, or malafide. And if it is, then it can be challenged in a writ petition and the Supreme Court can judicially review the choice of policy," he told reporters here.

Swamy reiterated that Chidambaram's role needs to be probed and he should be questioned by the CBI.

"It is a matter of surprise that several Ministers of the UPA Government have defended Chidambaram against my charge of his culpability in the 2G spectrum scam," he said.

The Ministers have contended that Chidambaram cannot be faulted for adopting a particular policy. These Ministers are "ignorant," he said.

Swamy, a petitioner in the 2G spectrum allocation case, had recently submitted to the Supreme Court a Finance Ministry note which said the Telecom Ministry could have gone in for auction of 2G spectrum licenses had Chidambaram, the then Finance Minister, insisted on it.