A) 4-ethyl-3-methylhexane
B) 3-ethyl-4-metbylhexane
C) 3-methy-4-ethyihexane
D) 3-iso-pentylpropane
Correct Answer: B
Solution :
\[\underset{3-\text{ethyl}-4-\text{methylhexane}}{\mathop{\overset{\text{6}}{\mathop{\text{C}}}\,{{\text{H}}_{\text{3}}}\overset{\text{5}}{\mathop{\text{C}}}\,{{\text{H}}_{\text{2}}}\underset{\begin{smallmatrix} \text{ }\!\!|\!\!\text{ } \\ \text{C}{{\text{H}}_{\text{3}}} \end{smallmatrix}}{\overset{\text{4}}{\mathop{\text{C}}}}\,\text{H}-\underset{\begin{smallmatrix} \text{ }\!\!|\!\!\text{ } \\ \text{C}{{\text{H}}_{\text{2}}} \end{smallmatrix}}{\overset{\text{3}}{\mathop{\text{C}}}}\,\text{H}\underset{-}{\overset{-}{\mathop{{}}}}\,\overset{\text{2}}{\mathop{\text{C}}}\,{{\text{H}}_{\text{2}}}\overset{\text{1}}{\mathop{\text{C}}}\,{{\text{H}}_{\text{3}}}}}\,\]
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