The total energy of electron in an atom is a combination of potential energy and kinetic energy. If total energy is `-E` for an electron in an atom, then its K.E. and P.E. respectively are 

Options

A. 2E,-E
B. 2E,E
C. E,-2E
D. E,-E

Answer

C

Explanation

T=-KE, TE = 1/2 PE