The correct answer is: C. as and when necessary.
The Commonwealth Heads of Government Meeting (CHOGM) is a biennial meeting of the heads of government of the Commonwealth of Nations. The first CHOGM was held in London in 1971, and the most recent was held in Kigali, Rwanda, in June 2022.
The CHOGM is the supreme decision-making body of the Commonwealth, and it is responsible for setting the Commonwealth’s agenda and priorities. The meeting is attended by the heads of government of all 54 Commonwealth member states, as well as the Commonwealth Secretary-General.
The CHOGM is a forum for the leaders of the Commonwealth to discuss issues of common interest, such as democracy, development, and climate change. The meeting also provides an opportunity for the leaders to build relationships and strengthen ties between their countries.
The CHOGM is held every two years, but it can be held more frequently if necessary. The next CHOGM will be held in Australia in 2024.
The other options are incorrect because:
- Option A is incorrect because the CHOGM is not held once a year.
- Option B is incorrect because the CHOGM is not held biannually.
- Option D is incorrect because the CHOGM is not held at intervals of three years.