Step 1: Understand Fundamental Duties.
Fundamental Duties remind citizens of their responsibilities toward the nation. They were not in the original 1950 Constitution.
Step 2: The committee.
In 1976 the government set up the Swaran Singh Committee to suggest reforms. It recommended adding Fundamental Duties.
Step 3: How they were added.
Based on this advice, the 42nd Amendment Act, 1976 added Part IV-A and Article 51-A with ten duties. Later the 86th Amendment, 2002 added one more.
Step 4: Rule out others.
The Sarkaria Commission dealt with Centre-State relations. The Balwant Rai Mehta Committee suggested Panchayati Raj. The Verma Committee came later for implementation.
Step 5: Conclude.
The correct answer is the Swaran Singh Committee.
Answer: Swaran Singh Committee