During uniaxial compressive testing of a rock specimen of diameter 54 mm and length 120 mm, the axial strain was found to be 6.5 × 10-4 mm/mm. If the Poisson's ratio of the rock is 0.3, the volumetric strain of the rock specimen in mm/mm is
A. 1.95 ∗ 10-4
B. 2.60 ∗ 10-4
C. 2.34 ∗ 0-2
D. 3.12 ∗ 10-2
Answer: Option B
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