The correct answer is option 'D' - Central Government.

The National Human Rights Commission (NHRC) is an autonomous body established under the Protection of Human Rights Act, 1993. It is responsible for the promotion and protection of human rights in India. The NHRC consists of a Chairperson and other members, whose salaries, allowances, and other service conditions are determined by the Central Government.

Here is a detailed explanation of why the correct answer is option 'D':

1. The NHRC is an autonomous body: The NHRC is an independent institution that operates separately from the government. It is not directly controlled by the President of India, Parliament of India, or the Chairman of NHRC. This independence ensures that the NHRC can function impartially and effectively in its mandate to protect human rights.

2. Determination of salaries and allowances: The salaries, allowances, and other service conditions of the members of the NHRC are determined by the Central Government. This means that the Ministry of Home Affairs, which is responsible for the administration of the NHRC, has the authority to decide the remuneration and perks for the members.

3. Reasons for Central Government's role: The involvement of the Central Government in determining the salaries and allowances of NHRC members is essential for several reasons:

a) Budgetary control: The Central Government is responsible for allocating funds to various autonomous bodies, including the NHRC. By determining the salaries and allowances, the government can ensure that the financial resources are allocated efficiently and in accordance with the overall budgetary framework.

b) Accountability and oversight: The Central Government plays a crucial role in ensuring accountability and oversight of the NHRC. By having the authority to determine the service conditions, the government can exercise control over the functioning of the NHRC and ensure that it operates within the legal and constitutional framework.

c) Uniformity and consistency: The involvement of the Central Government in determining the salaries and allowances of NHRC members ensures uniformity and consistency across different autonomous bodies. This helps in avoiding disparities and maintaining a standardized approach in terms of remuneration and perks.

In conclusion, the correct answer is option 'D' - Central Government. The salaries, allowances, and other service conditions of the members of the National Human Rights Commission are determined by the Central Government to ensure accountability, budgetary control, and uniformity.