Q. The ascending order of stability of the $H _{3} \bar{C}(P), C _{6} H _{5} \bar{C} H _{2}(Q)$, $\left( CH _{3}\right)_{2}- CH (R)$ and $H _{2} \overline{ C }- CH = CH _{2}( S )$ is
J & K CETJ & K CET 2009Organic Chemistry – Some Basic Principles and Techniques
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