The correct answer is (c), Baluchistan. Gwadar is a port city in Balochistan, Pakistan. It is located on the Arabian Sea, at the mouth of the Persian Gulf. Gwadar is a strategically important port, and it is being developed as a major economic hub.
Sindh is a province in Pakistan. It is located in the south of the country, and it is the most populous province in Pakistan. The capital of Sindh is Karachi.
Punjab is a province in Pakistan. It is located in the north of the country, and it is the second most populous province in Pakistan. The capital of Punjab is Lahore.
Pakhtunkhwa is a province in Pakistan. It is located in the north-west of the country, and it is the third most populous province in Pakistan. The capital of Pakhtunkhwa is Peshawar.