India and which country signed a Memorandum of Implementation (MoI) for the co-development of the UNICORN (Unified Complex Radio Antenna) mast designed to enhance the stealth characteristics of warships and will be fitted on Indian Naval warships?

### Concept & Verification International relations and defense technology cooperation current affairs. ### Step-by-Step Solution * The UNICORN (Unified Complex Radio Antenna) mast is an advanced naval technology used to reduce the radar cross-section of warships, enhancing their stealth. * India sought to co-develop and acquire this technology to upgrade the stealth capabilities of Indian Naval warships. * A Memorandum of Implementation (MoI) for this co-development was officially signed between India and Japan. ### Exam Strategy & Shortcut Associate the "UNICORN" naval mast technology specifically with the Japanese Maritime Self-Defense Force (JMSDF) and India-Japan defense ties. ### Common Pitfall Guessing France or Russia, as India traditionally signs many naval and defense tech agreements with them. Japan is a unique and specific partner for the UNICORN mast. ### Final Answer Therefore, the correct answer is **Japan**.