Which one of the following species is most stable [IIT-JEE 1995]

• A. \[p-{{O}_{2}}N-{{C}_{6}}{{H}_{4}}-\overset{+}{\mathop{C}}\,{{H}_{2}}\]
• B. \[p-C{{H}_{3}}O-{{C}_{6}}{{H}_{4}}-\overset{+}{\mathop{C}}\,{{H}_{2}}\]
• C. \[p-Cl-{{C}_{6}}{{H}_{4}}-\overset{+}{\mathop{C}}\,{{H}_{2}}\]
• D. \[{{C}_{6}}{{H}_{5}}-\overset{+}{\mathop{C}}\,{{H}_{2}}\]