3 years is the correct answer.

The correct answer is option 'B', which states that members of the National Commission for STs hold office for a term of 3 years.

The National Commission for Scheduled Tribes (NCST) is a constitutional body established under Article 338A of the Indian Constitution. It was set up with the aim of safeguarding and promoting the rights and interests of the Scheduled Tribes (STs) in India.

The term of office for the members of the National Commission for STs is mentioned in the National Commission for Scheduled Tribes Act, 2003. According to Section 4(1) of the Act, the members of the Commission shall hold office for a term of 3 years from the date on which they enter upon their office.

This means that once appointed to the Commission, the members serve for a period of 3 years. After the completion of their term, they may be eligible for reappointment subject to the provisions of the Act.

The 3-year term of office ensures that there is a certain level of stability and continuity in the functioning of the Commission. It allows the members to effectively carry out their responsibilities and work towards the welfare and development of the STs.

During their term, the members of the National Commission for STs perform various functions including:

1. Investigating and monitoring matters relating to the safeguards provided for the STs under the Constitution.
2. Inquiring into specific complaints regarding deprivation of rights and safeguards of the STs.
3. Participating and advising in the planning process of socio-economic development of the STs.
4. Evaluating the progress of the development programs and welfare measures implemented for the STs.
5. Submitting annual and special reports to the President of India on the implementation of the safeguards for the STs.

In conclusion, the members of the National Commission for STs hold office for a term of 3 years, as mentioned in the National Commission for Scheduled Tribes Act, 2003. This ensures stability and continuity in the functioning of the Commission and allows the members to effectively carry out their responsibilities towards the welfare and development of the STs.

In laxmikant, tenure is not mention.