The correct option is D Globin
The name 'haemoglobin' is derived from the words, 'heme' and 'globin', reflecting the fact that each subunit of hemoglobin is a globular protein (globin) with an embedded 'heme' group (group with an iron atom, that can bind to oxygen molecule).
Valine is an amino acid while insulin is a hormone made by the pancreas.
Therefore, the correct answer is option B.