AIIMS 2018 Physics Properties of Neutrons and Protons Assertion Reason Question

The assertion that the rest mass of a neutron is larger than that of a proton is true; the neutron has a rest mass of approximately 1.675 × 10⁻²⁷ kg, while the proton's mass is about 1.673 × 10⁻²⁷ kg. Therefore, the statement is correct, making option D the only valid choice, as it accurately reflects the relationship between the masses of neutrons and protons. Other options are not applicable in this context, as they do not provide relevant information or reasoning regarding the assertion and reason presented in the question. Understanding the mass differences between these nucleons is crucial in nuclear physics and helps explain their roles in atomic structure and stability.