Explanation:

- Coal Miners Day is observed annually on 4 May.

- This day honors the contributions and sacrifices made by coal miners.

- It's a reminder of the critical role they play in energy production and industry.

- Option:1, 3 May

- Not known for Coal Miners Day.

- Typically a day without any widespread event relevant to this context.

- Option:3, 5 May

- Not recognized as Coal Miners Day.

- Often associated with other events or observances.

- Option:4, 6 May

- Does not correspond to Coal Miners Day.

- Not generally associated with significant mining-related events.

- Option:5, 7 May

- Not related to the observance of Coal Miners Day.

- No link to coal mining celebrations or acknowledgments.

Correct Answer: 4 May