An explosion takes place on the surface of moon. An astronaut

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An explosion takes place on the surface of moon. An astronaut at some distance from the site of explosion will

1. Observe light and hear sound caused by the explosion
2. Observe light but not hear sound caused by the explosion
3. Hear sound but not observe light caused by the explosion
4. Neither hear sound nor observe light caused by the explosion

Correct Option: B

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