Two point charges - 4 μC and 5 μC are located at (1 , 0 , 3) and (1, 4, - 2) respectively, then the potential at (1, 0, 1) assuming zero potential at infinity will be (consider ε0 = 10-9/36π)

A)-9 kV
B)-6 kV
C)6 kV
D)9 kV
Answer : A) -9 kV 

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