Correct Answer :   Britain
                                                    
                                                                                                        'Exercise Konkan- 2021', a bilateral Naval Exercise held between the Indian Navy and the Royal Navy of Britain in Portsmouth, United Kingdom (UK).
 
Indian Naval Ship (INS Tabar), a Talwar class stealth frigate of Indian Navy and HMS Westminster of the Royal Navy undertook the exercise in non contact form due to Covid-19 pandemic. It aims to enhance interoperability, synergy and cooperation between both the Navies.
Exercise Konkan :
It is held annually since 2004 between the Indian Navy and the Royal Navy of Britain. The 2019 Edition was held on the English Channel, UK.