Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Identify correct reactivity order for 
reaction.
(I) 
(II) 
(III) 
A
I 
II 
III
II III
B
II 
I 
III
I III
C
I 
III 
II
III II
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Stability of carbocastion is the major concern for 
reaction.
Case I 
→ 
(Aromatic carbocation)
Case II 
→ 
(Aromatic carbocation)
Case III 
→ 
(Anti Aromatic with 
electrons. Molecule is planar and B atom have a vacant p-orbital where 
cloud can be delocalised)
Out of case I & case II, case II, carbocation is more stable because N shows Heigher +M (being less electro -ve) than O. IIIrd is least stable due to antiaromatic nature.
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