What are the duties of the Chief of Defence Staff (CDS) as Head of the Department of Military Affairs ? 1. Permanent Chairman of Chiefs of Staff Committee 2. Exercise military command over the three Service Chiefs 3. Principal Military Advisor to Defence Minister on all tri-service matters Select the correct answer using the code given below :

1. (a)1, 2 and 3
2. (b)1 and 2 only
3. (c)2 and 3 only
4. (d)1 and 3 only