“Operation All out” of the Indian Army has been launched in January 2015 agaist?

The answer is B, Bodo militants in Assam. The Indian Army launched Operation All Out in January 2015 against the NDFB factions operating in the Bodoland region of Assam, after a spate of militant violence in late 2014 and early 2015. It was a counter-insurgency push in the Bodo-dominated districts, not a border or Maoist operation.

Why the others are wrong:

• A (Naxalites in Chhattisgarh): Anti-Naxal operations in Chhattisgarh are run by the state police with CRPF and other CAPF units. The Army is not the lead force there, and that operation is not called Operation All Out.
• C (Militants in J&K): Operation All Out is strongly associated with J&K, but the big launch there came in 2017, not January 2015. Don't carry the later J&K association back to 2015.
• D (Cross-border infiltration): Infiltration along the LoC is handled through Operation Rakshak and related measures, not this operation.

The core concept is the Army's role in internal security under Article 355 and the Armed Forces (Special Powers) Act, along with the Bodo Accord of 2003 and the 2020 settlement. For Mains, it links to Northeast insurgency, the peace-process versus operations trade-off, and the Bodo question.

Trap: Aspirants pick C because Operation All Out is famous for J&K. Date and location must be checked together.