Answer
Phrase (a) is incorrect.
Work Step by Step
On page 1299, the text states: "Any nuclide whose proton number Z or neutron number N has one of these values turns out to have a special stability that may be made apparent in a variety of ways."
Therefore, we do not say that nuclides are magic when only the mass number $A$ is equal to one of these numbers.
Phrase (a) is incorrect.
