Select the correct code about complex [Cr(NO2)(NH3)5][ZnCl4]:
(I) IUPAC name of compound is pentaamminenitrito-N-chromium (III) tetrachlorozincate(II)
(II) It shows geometrical isomerism
(III) It shows linkage isomerism
(IV) It shows coordination isomerism
a. III, IV
b. I, III and IV
c. II, III and IV
d. I, II, III and IV