When a leaf electroscope is charged, its leaves spread apart because:?

Question

a. like charges exert repulsive force on other like charges over a distance

b. opposite charges repel each other over a distance

c. positive charges spread over metal surfaces

d. negative charges attract each other and all join together on the k**b

Answer 1

how is tat tis question comes under botany....

anyhow i feel the answer is (a)