Assertion: In the extraction of Ag, complex Na [Ag (CN)₂] is reacted with Zn. Reason: Zn is d-block transition metal.

Here assertion is correct but reason is incorrect. Reaction occurring in extraction of silver are- 2 2 2 2 2 4 4 2 [ ( ) ] 2 [ ( ) ] [ ( ) ] 2 Ag S NaCN Na Ag CN Na S Na Ag CN Zn Na Zn CN Ag → → Scandium and zinc are not counted as transition metals as they do not have half-filled d-orbital.