Match List - I with List - II

	List - I		List - II
(a)	Chlorophyll	(i)	Ruthenium
(b)	Vitamin-$${B_{12}}$$	(ii)	Platinum
(c)	Anticancer drug	(iii)	Cobalt
(d)	Grubbs catalyst	(iv)	Magnesium

Choose the most appropriate answer from the options given below :

Match List - I with List - II :

List - I (Chemicals)

(a) Alcoholic potassium hydroxide

(b) Pd/BaSO₄

(c) BHC (Benzene hexachloride)

(d) Polyacetylene

List - II (Use / Preparation / Constituent)

(i) Electrodes in batteries

(ii) Obtained by addition reaction

(iii) Used for $$\beta$$ - elimination reaction

(iv) Lindlar's catalyst

Choose the most appropriate match :

Compound with molecular formula C₃H₆O can show :

The correct structures of trans-[NiBr₂(PPh₃)₂] and meridonial-[Co(NH₃)₃(NO₂)₃], respectively, are