Question

The number of isomers including stereoisomers obtained when alanine is heated are:

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

Answer: (C)

Alanine is $\alpha$-amino acid and gives piperazine on heating with $3$ isomers (cis and trans) and cis isomer is optically active.