The country that supported Pakistan in building Gwadar Port was

China has been the principal partner in the development of Gwadar Port situated on the Arabian Sea. The port is a strategic element of the China Pakistan Economic Corridor and provides access to the Indian Ocean for Chinese trade routes. It also enhances Pakistan maritime trade capacity and creates opportunities for regional connectivity with Central Asia and the Middle East. Construction funding and technical expertise largely came from Chinese cooperation. Therefore the country that supported Pakistan in building Gwadar Port was China which makes option A correct.