Former Chairman of Telecom Regulatory Authority of India (TRAI) Nripendra Misra was today questioned by the CBI in connection with the 2G spectrum allocation scam. Misra, who was also the Secretary in the Telecom Ministry, had taken over the chairmanship of TRAI from Pradip Baijal in 2006. The retired IAS officer, who arrived at the CBI Headquarters in forenoon, was questioned in detail with regard to the policy and other issues relating to the spectrum allocation policy. Agency sources said that Misra had reportedly written to the then telecom Secretary in January 2008 objecting the first-cum-first-serve policy adopted by the department in the allocation of 2G spectrum to new operators without specifying its availability.