Correct Answer :   USA
                                                                                                        
                                                    The Thirty Meter Telescope (TMT) project is situated on Mauna Kea, an inactive volcano in Hawaii, USA. 
With a 30-meter diameter primary mirror, it is the world’s most advanced ground-based observatory for optical, near-infrared, and mid-infrared observations. 
Collaboratively developed by institutions from the USA, Japan, China, Canada, and India, TMT incorporates innovations in precision control, segmented mirror design, and adaptive optics, showcasing global collaboration in advancing astronomical research.