Correct answer: A. Sawai Jai Singh II
Explanation: Jaipur was founded by Sawai Jai Singh II, the ruler of the Kachwaha Rajput state of Amber, in 1727. He shifted the capital from Amber to the new city because the growing population, water needs, and geographical situation required better planning. Jaipur was designed according to a planned grid layout, making it an important example of an early planned city in India. Therefore, option A is correct.
The other names are associated with different historical settings. Shivaji founded and developed Maratha power, Akbar established Mughal authority in northern India, and Krishnadeva Raya was a famous ruler of the Vijayanagara Empire. None of them founded Jaipur. The key association is simple: Sawai Jai Singh II founded Jaipur, while its planned design and astronomical observatory reflect his interest in administration, architecture, and astronomy.