Antony said he had not taken any action when the army chief told him about the bribe offer in 2010 as he had told Gen Singh to do so but he had refused to pursue the matter then.
"That day I did not do anything...I accept that day I did not take action. I am not denying that," he said, replying to a discussion in the Rajya Sabha on the functioning of the defence ministry.
As Opposition members sought to corner him over his inaction leading to an uproar, Antony said the army chief did not want to pursue it "so I did not take action".
Recalling Gen Singh's visit to his office in 2010, Antony said the army chief had told him that he had been offered crores of rupees as bribe by Tejinder Singh. "I was shocked," the defence minister said while displaying how he put his hand on his forehead.
"After that day, nobody took any action...Nobody demanded a CBI inquiry. When the matter was printed, without anybody asking for CBI inquiry, I ordered CBI probe," Antony said.
This agitated Opposition members; All India Anna Dravida Munnetra Kazhagam's V Maitreyan, Balbir Punj of the Bharatiya Janata Party and some other members were on their feet. They were saying that the matter would not have been investigated had it remained secret.
The chair had a tough time placating the agitated members to enable Antony continue with his reply.