Assertion : The degree of complex formation in actinides decreases in the order
M4+ > MO22+ > M3+ > MO2+
Reason : Actinides form complexes with π-bonding ligands such as alkyl phosphines and thioethers.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not correct explanation of A
(c) A is true but R is false
(d) A and R are false