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Q.

Assertion (A):  Benzene can be prepared by cyclic trimerisation of  ethyne in red hot iron tube.
Reason (R): Ethyne is a aliphatic hydrocarbon and benzene is aromatic hydrocarbon. 
 

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a

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

b

Both A and R are true and R is the correct explanation of A.

c

A is true but R is false.

answer is A.

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Detailed Solution

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

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