Pentan-2-one and 3-methylbutanone are a pair of isomers.

Pentan-2-one and 3-methylbutan-2-one are

n-Pentane and 2-methylbutane are a pair of

Correct statement by changing underline part of sentence Pentan-2-one and pentan-3-one are ul("chain isomers") .

Assertion (A): Pentane and 3 methyl pentane are chain isomers. Reason (R ): Pentane is a straight-chain alkane while 3 -methyl pentane is branched-chain alkane.

Assertion (A): Pentane and 3 methyl pentane are chain isomers. Reason (R ): Pentane is a straight-chain alkane while 3 -methyl pentane is branched-chain alkane.

How do you distinguish the Pentan-2-one and pentan-3-one pairs of compound .