Reason: White light is composed of seven colours
A. Both A and R are true and R is the correct explanation of A 
B. Both A and R are true and R is not the correct explanation of A 
C. A is true but R is false 
D. A is False but R is true
B. Both A and R are true and R is not the correct explanation of A 
Explanation:
Both Assertion and Reason are true and Reason is not the correct explanation of Assertion
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