The question pertains to a significant historical and geopolitical event concerning Pakistan's acquisition of Gwadar Port. Gwadar is a deep-sea port located on the Arabian Sea at Gwadar in Balochistan province of Pakistan. Its strategic location makes it a crucial asset for regional trade and connectivity.
Pakistan purchased Gwadar from the Sultanate of Oman. This transaction took place on 8 September 1958, when Pakistan bought the enclave for 5.5 billion Pakistani rupees (equivalent to $3 million at the time). Before this, Gwadar had been an overseas possession of Oman for over two centuries, since 1783. The other options—Saudi Arabia, Qatar, and UAE—are Gulf countries but were not involved in the sale of Gwadar to Pakistan. Understanding such historical transactions is vital for comprehending regional political and economic dynamics.