Q.
Homoleptic complexes among the following are
(A) $K _{3}\left[ Al \left( C _{2} O _{4}\right]_{3}\right.$,
(B) $\left[ CoCl _{2}( en )_{2}\right]^{+}$
(C) $K _{2}\left[ Zn ( OH )_{4}\right]$
Solution: