**Core Concept:**
Hemoglobin is a protein found in red blood cells that plays a crucial role in transporting oxygen from the lungs to the body's tissues and removing carbon dioxide. Hemoglobin contains four polypeptide chains, two alpha (α) and two beta (β), which are made up of prosthetic groups.

**Why the Correct Answer is Right:**
Hemoglobin consists of four polypeptide chains, two alpha (α) and two beta (β), which contain prosthetic groups. The correct answer is **D**. The correct answer is not provided directly, but we will explain why option D is correct.

Hemoglobin contains two types of prosthetic groups: the heme groups and the non-heme groups. Heme groups are the iron-containing molecules that bind to oxygen, while non-heme groups are those that are not iron-containing and play a role in protein folding and stability.

**Why Each Wrong Option is Incorrect:**
A. This option is incorrect because hemoglobin does not have three prosthetic groups.
B. This option is incorrect because hemoglobin has four polypeptide chains, not five.
C. This option is incorrect because hemoglobin has two types of prosthetic groups, not one.

**Clinical Pearl:**
A proper understanding of the role of prosthetic groups in hemoglobin is essential in understanding the mechanism of oxygen transport and binding. This knowledge is crucial for medical students, particularly for those studying hematology, respiratory medicine, and internal medicine.