Consider the following statements about mass defect and binding energy.
P. The mass defect corresponds to the mass converted into energy when a nucleus is assembled from free nucleons.
Q. The binding energy equals the energy that must be supplied to break a nucleus completely into separate protons and neutrons.
R. A larger binding energy per nucleon generally implies greater nuclear stability.
S. For any nucleus, the binding energy equals the difference in mass between the nucleus and its constituent nucleons (without the factor c2).
Which of the following sets contains all the correct statements?
(a) P and R only
(b) P, Q and S only
(c) P, Q and R only
(d) P and Q only