(a) Coating with black colour inside the box
(b) Mirror
(c) Glass sheet
(d) Outer cover of the solar cooker

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2 Answers

(b) Mirror is responsible for green house effect.

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Correct option  (C) Glass sheet 

Explanation:

The solar cooker box is covered with a glass sheet that traps more and more Sun's heat rays in the solar cooker by producing green-house effect.

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