Option B) is the correct option that is the volume of the fulgurites is given as
                V = Π(3)^2 (21) cubic inches
The formula for the volume of cylinder is given as
              V = Πr^2h    (1)
       Where, r = radius of the cylinder
              h = height of the cylinder
According to the question we have been given that
  Diameter of the fulgurites, d = 6 inches
  Height of the fulgurites, h = 21 inches
  Thus radius of the fulgurites, r = d/2
                            r = 6/2
                            r = 3 inches
Putting the required value in equation (1) we get
         V = Π(3)^2 (21) cubic inches
Hence option B) is the correct option
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