A) \[\underset{\text{3-Methyl-2-bulanol}}{\mathop{C{{H}_{3}}\underset{OH\,\,\,\,\,C{{H}_{3}}\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,}{\mathop{-CH-CH-}}\,}}\,C{{H}_{3}}}}\,\]
B) \[\underset{\text{4-Methyl-2-pentyne}}{\mathop{C{{H}_{3}}-C\equiv C-CH{{(C{{H}_{3}})}_{2}}}}\,\]
C) \[\underset{\text{2-Ethyl-3-methyl-bul-1-ene}}{\mathop{C{{H}_{3}}-C{{H}_{2}}\underset{C{{H}_{2}}\,C{{H}_{3}}}{\mathop{\underset{||\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,}{\mathop{-C-CH-}}\,}}\,C{{H}_{3}}}}\,\]
D) \[\underset{\text{3-Methyl-4-ethyl heptane}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\underset{C{{H}_{2}}C{{H}_{3}}\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{CH-\overset{C{{H}_{3}}}{\mathop{\overset{|\,\,\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\,}}\,}}\,C{{H}_{2}}C{{H}_{3}}}}\,\]
Correct Answer: D
Solution :
Ethyl should come before methyl.
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