Buoyed by Union Minister Natwar Singh's decision to resign on the Volcker controversy, an aggressive Bharatiya Janata Party-led opposition Wednesday targeted Sonia Gandhi [Images] in Parliament demanding her resignation as chairperson of the National Advisory Council, saying "double standards" would not be accepted.

• Volcker Report

Though business was back to normal after four days of disruption on the issue in the Lok Sabha and the Rajya Sabha, main opposition BJP staged a walkout in both Houses expressing dissatisfaction over government's response.

In the Lok Sabha, Leader of the Opposition Lal Kishenchand Advani, who led the walkout, contended that Sonia should quit as NAC chairperson saying, "Double standards will not do."

He said the yardstick for Natwar Singh should be applied to her as the Congress was also named as a non-contractual beneficiary along with the former external affairs minister in the Volcker findings.

"Our leader (Sonia) is not on a transfer order from outside," Parliamentary Affairs Minister Priyaranjan Dasmunsi said in a spirited reply telling Advani that he might be a "victim of outside dictates" but not the Congress president.

Dasmunsi said the opposition demand emanated from its "frustration" as the BJP has been attacking Sonia from the day she took over as Congress chief.

Maintaining that government was determined to get to the truth, he said it would await the report of the Justice R S Pathank Inquiry Authority.

"We have made it abundantly clear that our government shall deal with the the issue firmly," he said.