Which of the following are correct chain isomers of butane ?
(i)

Options

A. (i) and (iii)
B. (ii) and (iv)
C. (i) and (ii)
D. (iii) and (iv)

Answer

C

Explanation

Isomers are compounds having the same melocular formula but different structures . Molecular formula of butane is `C_(4)H_(10)` .Structure (i) and (ii) have the same molecular formula but only structures are different .So (i) and (ii) are isomers while structure (iii) and (iv) have molecular formula `C_(4)H_(8)`.