Explanation
Why Correct: During the 1990s, India's tertiary sector (services) recorded the highest growth rate, driven by IT, telecommunications, and financial services.
Distractor Analysis: The primary sector includes agriculture and allied activities, which grew slower. The secondary sector (manufacturing) also grew but less than services. The sectors did not grow at the same rate; services outperformed.
Takeaway: India's post-1991 reforms boosted the services sector, making it the fastest-growing sector.