Boron Has 3 Valence Electrons $\pi$ -Bonds Using Its D-Orbitals
D) Formation Of

Multiple Choice

Boron has 3 valence electrons. Which of the following processes is involved in boron's achieving a complete outer shell?

A) formation of a B³⁺ cation
B) formation of bridge bonds
C) formation of $\pi$ -bonds using its d-orbitals
D) formation of $\pi$ -bonds using sp³-orbitals
E) None of these choices is correct.