The Lewis acidity of BF3 is less than BCl3 even though fluorine is more electronegative than chlorine. It is due to
A. stronger 2p (B) - 2p (F) σ-bonding
B. stronger 2p (B) - 2p (F) π-bonding
C. stronger 2p (B) - 3p (Cl) σ-bonding
D. stronger 2p (B)- 3p (Cl) π-bonding
Answer: Option B
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