The first unified Asian Games were held in:

New Delhi

The correct answer is Option (4) - New Delhi

The first unified Asian Games were held in New Delhi, India, in 1951.

The Asian Games, also known as Asiad, is a multi-sport event held every four years among athletes from all across Asia. The idea of the Asian Games was conceived by Guru Dutt Sondhi, a sports official from India, who proposed the creation of a Pan-Asian sports event to promote goodwill and friendship among Asian nations. The inaugural edition of the Asian Games took place in New Delhi, India, from March 4 to March 11, 1951. It was officially known as the First Asian Games. The event brought together athletes from 11 Asian countries to compete in various sports disciplines.

The participating countries in the first Asian Games included Afghanistan, Burma (now Myanmar), Ceylon (now Sri Lanka), India, Indonesia, Iran, Japan, Nepal, the Philippines, Singapore, and Thailand. A total of 6 sports were contested at the inaugural Asian Games, including athletics, aquatics (swimming), basketball, cycling, football (soccer), and weightlifting. These sports events were held at various venues in New Delhi.

The first Asian Games marked a significant milestone in the history of sports in Asia. It provided a platform for athletes from diverse cultures and backgrounds to come together and compete in the spirit of sportsmanship and camaraderie. The success of the inaugural Asian Games laid the foundation for future editions of the event, which have since grown in scale and stature.

Overall, the decision to host the first unified Asian Games in New Delhi, India, underscored the country's commitment to promoting sports and fostering international cooperation among Asian nations. The event's success paved the way for the continued growth and development of the Asian Games as one of the premier sporting events in the world.