The correct answer is pahoehoe.
The constituents generated in the volcanic eruptions are known as pyroclastic material. Of the given options pahoehoe is not considered as a pyroclastic material. It is a kind of lava flow of basaltic rock, generally dark-colored with a ropey or smooth surface. It is one of the two prime forms of lava flow discharged from volcanoes of the Hawaiian kind, the other is aa.
Pahoehoe lava is a usual kind of basaltic lava, which cools down producing billowy, smooth, or ropy surfaces. Generally, it is produced by various small breakouts of lava from an over-crusted irregular, inflating flat flow.
