Explanation:

- Option 1: 1969

- The First National Commission on Labour in India submitted its report in this year.

- This report aimed at studying the prevailing working conditions and labor laws.

- Option 2: 1958

- No major report on labor was submitted in this year.

- It's not related to the First NCL.

- Option 3: 1999

- This year is linked to the Second National Commission on Labour.

- The second commission evaluated changes since the first report.

- Option 4: 1947

- This year marks India's independence.

- No labor report was submitted right in this year.

Option 1: 1969 is correct.