The type of volcano that contains the three of the most active volcanoes is the cone volcano.
The volcano cone is one which is occurs on a triangle-shaped hill and the materials (lava) from the eruptions are ejected from on top the hill onto the earth crust.
The North Island of New Zealand called the Taupo Volcanic Zone is the area which contains three of the most frequently active volcano cone in the world.
Therefore, the Option B. is correct because the type of Volcano in the North Island of New Zealand which is most active is the Cone Volcano.
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