Answer:
A and B
Step-by-step explanation:
Both the given statements are true.
An atom has two main parts that include the nucleus and the electron cloud and an atom has three subatomic particles electron, proton and neutron.
The nucleus is consists of neutrons (neutral subatomic particles) and protons (positively charged) and the cloud of electrons consists of electrons which are negatively charged particles.
Hence, the correct answer is "A and B".