The number of optical isomers of the compound, `CH_(3)-underset(Br)underset(|)(CH)-underset(Br)underset(|)(CH)-COOH` is :

Options

A. 0
B. 1
C. 3
D. 4

Answer

D

Explanation

According to van't Hoff's equation, no. of option isomers `=2^(n)` (when the molecule has no symmetry).
where, n = no. of chiral carbon atoms.
`CH_(3) - overset(**)(C )HBr- overset(**)(C )HBr - COOH`
No of chiral carbons=2
`:.` No. of optical isomers are `=2^(n) = 2^(2) =4`