Dark Matter
Which of the following statements are correct with respect to Dark Matter?
- Dark Matter emits no light and cannot be seen directly
- Dark Matters are stars or planets.
- Astronomers do not detect gamma rays produced by them.
- Dark matter is black hole.
Select the correct answer using the codes given below:
| A |
2, 3 and 4
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| B |
1, 3 and 4
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| C |
1 and 3
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| D |
1, 2, 3 and 4
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