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(A): The hardness of silica is less than...

(A): The hardness of silica is less than that of diamond .
(R): In silica, each silicon atom is surrounded by two oxygen atoms whereas in diamond each carbon atom is surrounded by 4 carbon atoms 

A

a. Both A and R are true, and R is correct explanation of A

B

b. Both A and R are true, and R is not the correct explanation of A

C

c. A is true but R is false

D

d. A is false but R is true

Text Solution

Verified by Experts

The correct Answer is:
C
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