Explanation:

- Option 1: 1948

- The first industrial policy of India was indeed announced in 1948.

- It laid the foundation for a mixed economy.

- The policy aimed to encourage both public and private sectors.

- Option 2: 1956

- This year marked the announcement of the second industrial policy.

- It focused on expanding the role of the state in economic sectors.

- Option 3: 1964

- This was not the year of an industrial policy announcement.

- It was a period of economic consolidation in India.

- Option 4: 1972

- No significant new industrial policy was introduced this year.

- Focus remained on existing frameworks and policies.