Which of the following is NOT true? A
Volcanoes may form at a fault where a transform fault exists.
B
Volcanoes may form at a subduction zone where a convergent plate boundary exists.
C
Volcanoes may form an island arc at a convergent plate boundary.
D
Volcanoes may form at a mid-ocean ridge at where a divergent plate boundary exists.

Volcanoes may form at a fault where a transform fault exists is not a true statement.

Explanation:

olcThe volcanoes can be found across the globe, in most of the regions. What can be noticed though is that there is a high concentration of volcanoes a certain places, while there is much less or lacking in others. The places where there is high concetration of volcanoes are along the divergent and convergent plate boundaries, with isolated volcanic chains in the interior of the plates caused by hot spots.

The places where volcanoes are lacking, except the vast majority of the interior of the plates, are the transform plate boundaries. The reason for this is that at these plate boundaries the plates don't create a gap between each other and make the crust thinner so that magma can move toward the surface, instead, they slide past each other, thus create pressure between each other, which would make it even harder for magma to come out on the surface than in an interior of a plate.