Assertion : The lactic acid shows the geometrical isomerism. Reason : Lactic acid has carbon-carbon double bond.

• A

  If both assertion and reason are true and reason is the correct explanation of assertion.
• B

  If both assertion and reason are true but reason is not the correct explanation of assertion.
• C

  If assertion is true but reason is false.
• Correct answer
  D

  If both assertion and reason are false.

Solution

2-Hydroxy propanoic acid is known as lactic acid. It has following structure-
It has no carbon-carbon double bond and hence cannot show geometrical isomerism. However, it shows optical isomerism due to the presence of a chiral carbon atom.

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