RRB Group-D Model Paper 12 with answers for online practice

The pattern followed here is: Singapore India Maritime Bilateral Exercise (SIMBEX) is an annual bilateral naval exercise conducted by the Indian Navy and the Republic of Singapore Navy (RSN). The exercise has been held annually since 1994.
Similarly,
The annuallyheld VARUNA naval exercise is an integral part of France–India strategic relationship in the 21st century and consists of naval cooperation drills between the French Navy and the Indian Navy.

Hence, the answer is ‘VARUNA’.