Where is the world's first "Vedic Clock" installed ?

The correct answer is (C) Ujjain.

• The world's first "Vedic Clock" (Vikramaditya Vedic Clock) was inaugurated and installed in Ujjain, Madhya Pradesh in March 2024 atop an 85-foot tower at the Jiwaji Observatory (Jantar Mantar).
• Ujjain has historically been considered the prime meridian of ancient Indian astronomical calculations (Kal-Ganna); the digital Vedic Clock calculates time based on Vedic Muhurats, planetary positions, Ghati-Pala, and sunrise-to-sunset astronomical cycles.
• Varanasi and Prayagraj are ancient cultural hubs of Uttar Pradesh, while Bhopal is the state administrative capital.