Question

How many optically active stereoisomers are possible for butane-$2,3$-diol?

• A. $1$
• B. $2$
• C. $3$
• D. $4$

Answer 1

The correct option is B $2$

The number of optically active stereoisomers possible for 2,3−diol is 2 i.e. $d$ and $l$ which are optically active.

The meso-compound is optically inactive due to internal compensation.