Option c is the correct answer. Angkor Wat is a temple complex in the province of Siem Reap, Cambodia, originally dedicated to the Hindu god Vishnu in the 12th century CE. It was built by King Suryavarman II as his state temple and eventual mausoleum. Angkor Wat is the world's largest religious structure, covering some 400 acres ( 160 hectares), and marks the high point of Khmer architecture. It is also a UNESCO World Heritage Site.