Option b is the correct answer. Bukka I, the ruler of the Vijayanagara kingdom, sent his ambassador, Gangaram, to the emperor of China of Ming dynasty. The purpose of the embassy was to establish diplomatic relations between the two empires and to promote trade. The embassy was successful in achieving its objectives. The Chinese emperor was impressed by the envoy and granted him a number of gifts. The two empires also agreed to establish regular trade relations. The embassy of Gangaram is significant because it was the first time that a Hindu ruler of India had sent an ambassador to China. It marked the beginning of a new era of cooperation and understanding between the two countries. He was known for defeating the rulers of Arcot and the Reddis of Kondavidu. Bukka I also focused on developing the capital by constructing a fort and temples and promoting agricultural activities.