Question

Which subatomic particles are located in the nucleus of a carbon atom?
(1) protons, only
(2) neutrons, only
(3) protons and neutrons
(4) protons and electrons

Answer 1

answer is (3) protons and neutrons.

(P.S. The outer part contains the electrons)

Answer 2

Not just carbon atoms, but every single other atom has protons and neutrons in their nucleus. (3) is the correct one.
Hope this would help :))