Science, asked by sushantpathak, 7 months ago

please guys write a right answer.

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Answered by Yashashree29

1

Answer:

19. convex and concave

Explanation:

Answered by palaksingh2630

0

18- The child is suffering from myopia so he needs concave lens.

19- Concave and convex

20-Concave mirror

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