While the notes mentions reticulocytosis

the earliest response to iron therapy has been mentioned erythroid hyperplasia while the notes mentions reticulocytosis. Which should be marked?

You can’t measure erythroid hyperplasia in blood.

So for suppose if i start a person on iron therapy after 1 week, i check for reticulocyte count or Hb levels after 2-3 weeks.

I will mark A as the answer because in que he clearly mentioned haematological response.