The correct answer is option 2, Bimbisara. Bimbisara was a contemporary of Buddha. He was the ruler of the Magadha kingdom and played an important role in the spread of Buddhism. Bimbisara was known for his patronage of Buddha and his teachings. He even became a follower of Buddha and greatly contributed to the growth of Buddhism in his kingdom. Bimbisara`s support and encouragement were crucial in the establishment of the Buddhist monastic order. He recognized the importance of Buddha`s teachings and played a significant role in fostering a peaceful and harmonious society. It is important to note that while the other options mentioned in the question may have also been rulers during the same time period, Bimbisara had a known connection to Buddha and his teachings.