New Delhi, Aug. 9 -- A Central Bureau of Investigation (CBI) court on Monday sentenced former coal secretary HC Gupta to three-year, former joint-secretary K S Kropha to two-year, and Nagpur firm Grace Industries Limited (GIL)'s director Mukesh Gupta to four-year imprisonment days after convicting them of criminal conspiracy, cheating and under the Prevention of Corruption Act on July 29 over the allocation Maharashtra's Lohara east coal block....