Chapter 15 - Electric Charge, Forces, and Fields - Learning Path Questions and Exercises - Multiple Choice Questions - Page 553: 3

(c) both feel the same.

By Newton's third law, for every action there is an equal and opposite reaction. The electron and proton will attract each other with equal force. This is however true only if we neglect gravity. Mass of electron and proton are very small, so gravitational force is negligible.