AS Ranchi SSP, this 1998 batch Jharkhand cadre IPS, Praveen Kumar, bravely fought against the Naxal menace, gunning down many and forcing others to surrender. On Sunday, this IPS officer and DIG in National Investigating Agency (NIA) lost a crucial battle; his opponent this time was not the Maoists, but cancer. He was 46. After his death in New Delhi on Sunday, his mortal remains were flown to…