The correct option is B 1, 3 and 4
The National Defence Academy (NDA) is the Joint Services academy of the Indian Armed Forces, where cadets of the three services, the Army, the Navy and the Air Force train together before they go on to respective service academies for further pre-commissioning training. The NDA is located at Khadakwasla near Pune, Maharashtra. It is the first tri-service academy in the world. The National Defence Academy has the proud privilege of training more than 700 cadets from the 28 friendly countries. Afghanistan, Bhutan, Ethiopia, Fizi, Ghana, Kazakhstan, Kenya, Kyrgyzstan, Lesotho, Libya, Malaysia, Maldives, Nepal, Nigeria, Palestine, Papua New Guinea, Seychelles, Singapore, Sri Lanka, Sudan, Tajikistan, Tanzania, Tonga, Uganda, Uzbekistan, Vietnam.