D.It implies that only doctors who are brave and well educated make good doctors.
Explanation:
In the excerpt above, it says that usually doctors focus on being paid rather than curing their patients of their illness. It is hard to find those brave men who put their duty before their payment.
Good doctors are those whose primary focus is to treat patients and ask for fees on secondary terms.
Therefore the logical fallacy in this question is option four D.It implies that only doctors who are brave and well educated make good doctors.
