A) \[P-{{O}_{2}}N-{{C}_{6}}{{H}_{4}}{{-}^{+}}C{{H}_{2}}\]
B) \[{{C}_{6}}{{H}_{5}}{{-}^{+}}C{{H}_{2}}\]
C) \[P-Cl-{{C}_{6}}{{H}_{4}}{{-}^{+}}C{{H}_{2}}\]
D) \[P-C{{H}_{3}}O-{{C}_{6}}{{H}_{4}}{{-}^{+}}C{{H}_{2}}\]
Correct Answer: A
Solution :
\[P-N{{O}_{2}}-{{C}_{6}}{{H}_{4}}-\overset{+}{\mathop{C}}\,{{H}_{2}}\] is the least stable carbocation among these because electron withdrawing\[-N{{O}_{2}}\]group destabilizes the carbocation.
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