The correct answer is Japan and United States of America.
The Malabar Trilateral Naval Exercise is an annual maritime exercise between the Indian Navy, the Japan Maritime Self-Defense Force, and the United States Navy. The exercise was first held in 1992, and has been held every year since then, except for 1998 and 2007. The exercise is designed to improve cooperation between the three navies in areas such as anti-piracy, anti-terrorism, and search and rescue.
The 22nd edition of the Malabar Trilateral Naval exercise was held in June 2018 in the Bay of Bengal. The exercise involved ships, aircraft, and personnel from the Indian Navy, the Japan Maritime Self-Defense Force, and the United States Navy. The exercise was the first time that the three navies had conducted a joint exercise in the Bay of Bengal.
The exercise was a success, and helped to improve cooperation between the three navies. The exercise also demonstrated the commitment of the three countries to working together to promote peace and security in the Indo-Pacific region.
Option A is incorrect. Russia did not participate in the 22nd edition of the Malabar Trilateral Naval exercise.
Option B is incorrect. Bangladesh did not participate in the 22nd edition of the Malabar Trilateral Naval exercise.
Option C is incorrect. Nepal did not participate in the 22nd edition of the Malabar Trilateral Naval exercise.
Option D is correct. Japan and United States of America participated in the 22nd edition of the Malabar Trilateral Naval exercise.