Step 1: Understanding the Concept:
The question refers to the New Economic Policy (NEP) introduced in India in 1991 to deal with a severe economic crisis.
Step 2: Detailed Explanation:
The economic reforms of 1991 are popularly known as the LPG reforms, which stands for:
\[\begin{array}{rl} \bullet & \text{Liberalization: The process of reducing government controls, regulations, and restrictions on the economy to encourage private enterprise.} \\ \bullet & \text{Privatization: The process of transferring ownership and management of public sector enterprises to the private sector.} \\ \bullet & \text{Globalization: The process of integrating the Indian economy with the global economy, involving freer flow of trade, capital, and technology.} \\ \end{array}\]
Since all three were the pillars of the 1991 reforms, the correct answer is "All of these".
Step 3: Final Answer:
Liberalization, Privatization, and Globalization are all part of the Indian economic reforms.