MCQ
Which lens is used by a person suffering from far$-$sightedness?
- ✓A convex lens
- BA concave lens
- CA cylindrical lens
- DA bi$-$focal lens
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| Producer | Primary consumer | Secondary consumer |
| A. Algae | Fish | Larva of mosquito |
| B. Fish | Algae | Larva of mosquito |
| C. Larva or mosquito | Algae | Fish |
| D. Algae | Larva of mosquito | Fish |