Assertion : C is -2- butene gives meso-2, 3-butanediol with dilute alkaline `KMnO_(4)` solution.
Reason : Dilute alkaline `KMnO_(4)` solution gives trans addition with alkenes.

Options

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
D. If both assertion and reason are false.

Answer

C

Explanation

`underset("cis - 2 butene")({:(H_(3)C-C-H),(" ||"),(H_(3)C-C-H):})" "overset("Alk. KMnO"_(4))underset("(cold)")rarr" "underset("(Meso)")({:(" "CH_(3)),(" |"),(H-C-OH),(" |"),(H-C-OH),(" |"),(" "CH_(3)):}`
Alkaline `KMnO_(4)` always gives cis-addition on olefins.