Answer :
Option b is correct i.e. increased MCH an older adult has suspected B12 deficiency, lab indices is most indicative of a B12 deficiency.
B12 vitamin insufficiency Anemia is a condition that develops when your body is unable to produce enough healthy red blood cells as a result of a vitamin B12 shortage. Red blood cells, which deliver oxygen to every region of the body, are made possible by this vitamin. Your tissues and organs cannot receive adequate oxygen if your red blood cell count is insufficient. Your body's ability to function is impacted by a lack of oxygen. An additional B vitamin is folic acid, also referred to as folate. Megaloblastic anemias can be brought on by either a folate or vitamin B12 deficiency. Several anemias cause faulty red blood cell production. They are enormous. They also have an oval form as opposed to the round shape of normal red blood cells. As a result, the bone marrow generates fewer red blood cells. Red blood cells may lose their viability earlier than expected. The likelihood of developing anemia caused by a vitamin B12 deficiency is higher in people whose ancestors came from northern Europe.
To know more about B12 deficiency please refer: https://brainly.com/question/28992818
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