Alkyne, C₇H₁₂, when reacted with alkaline KMnO₄ followed by acidification with HCl gives a mixture of (CH₃)₂CHCOOH + CH₃CH₂COOH. The alkyne C₇H₁₂ is

(A) 3-hexyne
(B) 2-methyl-2-hexene
(C) 2-methyl-3-hexyne
(D) 3-methyl-2-hexyne