The correct option is
C (A) - (III), (B) - (I), (C) - (IV), (D) - (II)
In Agave americaria, the condensed branches develop in the axil of bracts on the inflorescence.
In Oxalis, a group of bulbils arise from the ground level at the apex of tuberous root.
In Dioscorea bulbifera, bulbils develop from axils of leaves.
In Bulbophyllum, an epiphyte, generally one internode of the stem stores food and water and becomes tuberous. It appears as a bulb like structureand is called pseudobulb.
Therefore, the correct answer is option B.