New Delhi, Sep 15 (ANI): Congress and BJP react as Former Prime Minister Manmohan Singh said that he did his duty during his tenure. Singh said this while replying to Former CAG Vinod Rai's allegations on his role in the 2G allocation scam. Congress leader Sandeep Dixit supported Singh and said that he definitely did his duty what was required of him. Meanwhile, BJP leader Sambit Patra questioned Singh on the same and asked whose orders was he obeying.