The correct answer is (a) Smiling Buddha.
Smiling Buddha was the code name for India’s first nuclear test, conducted on 18 May 1974 at Pokhran Test Range in the Thar Desert of Rajasthan. The test was a success, and India became the sixth country in the world to acquire nuclear weapons.
The test was conducted by the Indian Atomic Energy Commission (AEC) under the leadership of Homi Bhabha. The device used in the test was a plutonium-fueled implosion device, and it was detonated at a depth of 100 meters. The yield of the test was estimated to be between 15 and 20 kilotons of TNT.
The Smiling Buddha test was a major milestone in India’s nuclear program, and it gave the country a significant deterrent against its adversaries. The test also had a major impact on India’s international relations, and it led to a number of sanctions being imposed on the country by the United States and other countries.
The other options are incorrect.
(b) Thunder Bolt is the code name of the Indian Air Force’s air-to-air missile.
(c) Flying Garud is the name of the Indian Air Force’s aerobatics team.
(d) Agni Pareeksha is the name of the Indian Army’s missile test range.