Question

Which of the following is the most stable carbocation ?

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

More the number of alpha hydrogens more is the stability of carbocation.
Option A : It has 2 $\alpha$-hydrogens

Option B: It has 9 $\alpha$-hydrogens


Option C : It has 2 $\alpha$-hydrogens



Option D : It has 4 $\alpha$-hydrogens



Since option (b) has the most number of $\alpha$-hydrogens , it is the most stable carbocation.
In general: carbocation stability order is $3^o>2^o>1^o$