Among the following pairs, the pair that illustrates stereoisomerism is

Options

A. 1-butanol and 2-butanol
B. cis-2-butene and trans-2-butene
C. dimethyl ether and ethanol
D. acetone and propanal

Answer

B

Explanation

But-2-ene shows stereoisomerism and can exist in the following two forms :

Both these isomers have the same structural formulae but differ in the relative spatial arrangement of hydrogen atoms and methyl groups around the double bond.