Question

Number of stereoisomers of lactic add is

• A. $1$
• B. $2$
• C. $3$
• D. $4$

Answer 1

Answer: (B)

$2$

Answer 2

Number of stereoisomers, if molecule cannot be divided into two equal halves $= 2^n$ $CH_3 -$ $\underset{\text{lactic acid}}{ {CHOH }}$ $-COOH$ $n = 1$, so stereoisomers $= 2^1 = 2$.