**Core Concept:** The question is asking about the capacity of hemoglobin, a crucial protein in red blood cells, to bind and transport oxygen. Hemoglobin's primary function is to facilitate oxygen transport from the lungs to the tissues and carbon dioxide transport back to the lungs. It does this by binding to oxygen molecules, forming oxyhemoglobin.

**Why the Correct Answer is Right:** When hemoglobin is fully saturated with oxygen, it can bind to 0.034 ml of oxygen per molecule. Since there are 64,000 molecules of hemoglobin in one gram, the total volume of oxygen carried is:

0.034 ml/molecule * 64,000 molecules/gram * 1 gram = 2,016 ml

**Why Each Wrong Option is Incorrect:**

A. This option is too low (2,016 ml) and doesn't reflect the actual capacity of hemoglobin to carry oxygen.
B. Similar to A, this option is incorrect as it does not accurately represent the total oxygen-carrying capacity of hemoglobin.
C. The value for this option is also too low (2,016 ml) and doesn't match the actual capacity of hemoglobin.
D. This option is incorrect as it does not correspond to the correct total oxygen-carrying capacity of hemoglobin.

**Clinical Pearl / High-Yield Fact:** Hemoglobin's oxygen-carrying capacity is crucial for understanding the pathophysiology of anemia, a condition characterized by reduced hemoglobin levels or impaired function. Anemia can result from various causes, including iron deficiency, hemolysis, or genetic disorders, and may lead to tissue hypoxia and adverse clinical outcomes.

**Correct Answer:** 2,016 ml