UKMLA PLAB AMC USMLE Prometric MCQ

Question Number 1163
Question:
the following is the high magnification of a blood film taken from a patient complaining of fatigue:
what is the most likely process causing this patient's symptoms?

a) marrow fibrosis
b) iron overload
c) impaired thymidine synthase
d) iron deficiency
e) overproduction of DNA