(1) The affinity of adult hemoglobin for oxygen
(2) The affinity of fetal hemoglobin for oxygen

A) The first item is greater than the second item.
B) The first item is less than the second item.
C) The first item is equal or nearly equal to the second item.

Hemoglobin

Hemoglobin is a protein in red blood cells responsible for transporting oxygen from the lungs to the body's tissues and returning carbon dioxide from the tissues back to the lungs.

Oxygen

A chemical element (O) essential for life, involved in cellular respiration, where it is used to produce energy from the breakdown of molecules like glucose.

Affinity

The degree to which a substance tends to combine with another, often used in the context of biochemical reactions.