The initial design and construction of which massive temple took place during the reign of Suryavarman II?

1. The question asks about a massive temple whose initial design and construction took place during the reign of Suryavarman II. 2. Suryavarman II was a king of the Khmer Empire, reigning from 1113 AD to about 1150 AD. 3. He is best known for commissioning the construction of Angkor Wat in present-day Cambodia, which was initially dedicated to the Hindu god Vishnu. 4. Sri Mariamman Temple is a Hindu temple in Singapore. Batu Caves Temple is a Hindu shrine in Malaysia. Kamakhya Temple is a Hindu temple in Assam, India. None of these were built during Suryavarman II's reign. 5. Therefore, Angkor Wat is the correct answer.