Assertion: Boron always froms covalent bond.
Reason: The small size of `B^(3+)` favours formation of covalent bond.

Options

A. If both assertion and reason are true and the reason is the correct explanation of teh assertion.
B. If both assertion and reason are true but reason in not the correct explation of the assertion.
C. If assertion is true but reason is false.
D. If assertion is false but reason is true.

Answer

A

Explanation

Boron always forms covalent bond because boron required vary high energy to form `B^(3+)` and again `B^(3+)` due to its very small size having high polarising power thus cause greater polarization and eventually significant covalent characterstics (Fajan's rule).