How many optically active stereomers are possible for butan-2, 3-diol?

• A

  1
• Correct answer
  B

  2
• C

  3
• D

  4

Solution

The structure of butane-2, 3 -diol is

$\therefore$ It has three stereoisomers as follows:

$\therefore$ It has two optically active isomers.

Hence, the correct answer is option: 'B'.