The correct answer is option 1, where the matching is as follows:
Joint exercise Indra corresponds to Joint anti-terrorism exercise (option 1)
Joint exercise Cope India corresponds to Joint air force exercise (option 2)
Joint exercise Ind-Indo Corpat corresponds to Coordinated maritime patrolling (option 3)
Joint exercise Yudhabhyas corresponds to Joint army exercise (option 4)
So, the correct matching is:
A - 1
B - 2
C - 3
D - 4
This means that Indra is a joint anti-terrorism exercise, Cope India is a joint air force exercise, Ind-Indo Corpat is a coordinated maritime patrolling exercise, and Yudhabhyas is a joint army exercise.