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Subject :NSO    Class : Class 8

Which one of the following is correct?

A
B
C
D


Perfect.

Ans 1:

Class : Class 8
it is glass and light can pass directly through it so why is option d correct the answer should be option a??? pls help me in this

Ans 2:

Class : Class 9

Ans 3:

Class : Class 8

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