**Core Concept**
The breakdown of **hemoglobin (Hb)** leads to the production of **bilirubin**, a yellow pigment. This process occurs in the spleen, where old or damaged red blood cells are removed from circulation. The **heme** part of hemoglobin is converted into bilirubin.

**Why the Correct Answer is Right**
One gram of hemoglobin liberates approximately 34 milligrams of bilirubin. This is because the molecular weight of hemoglobin is about 64,000 g/mol, with four heme groups per molecule, each contributing to bilirubin production. The **heme oxygenase** enzyme plays a crucial role in this conversion process.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it underestimates the amount of bilirubin produced from one gram of hemoglobin.
**Option B:** This option is also incorrect as it overestimates the bilirubin production.
**Option D:** Similarly, this option does not accurately represent the amount of bilirubin liberated from one gram of hemoglobin.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that increased bilirubin production can occur in conditions like hemolytic anemias, leading to **jaundice**. The liver's ability to conjugate bilirubin is critical in preventing its accumulation.

**Correct Answer:** C. 34 mg