Q.
A. 8πR2 (n1/3 - 1)T
B. 4πR2 (n1/3 - 1)T
C. 8πR2 (n2/3 - 1)T
D. 4πR2 (n2/3 - 1)T
E. None of the above
Correct choice: B
Explanation: