A Delhi court on Monday sentenced ex-Union Minister PK Thungon to four-and-a-half years in jail in connection with a case lodged in 1998 pertaining to the misappropriation of Rs 2 crore released by the Centre. Thungon, a former CM of Arunachal Pradesh, was also slapped with a fine of Rs 10k. Three other convicts were also imprisoned in the case.