The VA group element having more number of allotropes is

In group 15 all elements except nitrogen and bismuth, show allotropy. Several allotropic forms of phosphorus are present.Major allotropes of phosphorus include white, red and black phosphorus. Arsenic has six different allotropes out of which three are in amorphous form. Brittle, steel grey solid is the most stable and common allotrope of arsenic. Antimony has four allotropes. One of these is explosive.