Explanation:
The governing council of NITI Aayog consists of various members, including the Prime Minister, Chief Ministers of States, Lieutenant Governors of Union Territories, and other relevant ministers. However, the President of India is not a member of the governing council of NITI Aayog.

Members of the Governing Council:
- Prime Minister: The Prime Minister of India is the chairperson of the governing council of NITI Aayog. As the head of the government, the Prime Minister plays a crucial role in setting the agenda and providing guidance to the council.

- Chief Ministers of States: The Chief Ministers of all the states are members of the governing council. They represent their respective states and provide inputs and suggestions on various policies and programs.

- Lieutenant Governors of Union Territories: The Lieutenant Governors of Union Territories are also members of the governing council. They represent the Union Territories and contribute to the decision-making process.

- Other Ministers: Apart from the Prime Minister, Chief Ministers, and Lieutenant Governors, other relevant ministers may also be part of the governing council. These ministers are selected based on their area of expertise and the specific matters being discussed.

Role of the President:
While the President of India holds a significant position in the country, they are not involved in the day-to-day functioning of the government or its various councils and committees. The President's role is primarily ceremonial, and they act as the head of state. They represent the country at international events and exercise certain powers as per the Constitution of India. However, they do not play a direct role in the functioning or decision-making of the NITI Aayog's governing council.

Therefore, the correct answer is option 'B' - President. The President of India is not a member of the governing council of NITI Aayog.