**Core Concept**
Synthetic oxygen carriers, also known as blood substitutes, are designed to mimic the oxygen-carrying capacity of hemoglobin in red blood cells. These substances are crucial in medical applications where blood transfusions are not feasible or when there is a need to provide oxygenation to tissues.

**Why the Correct Answer is Right**
The correct synthetic oxygen carrier is Hemoglobin-based oxygen carriers (HBOCs). HBOCs are made up of recombinant human hemoglobin or hemoglobin from other sources, which are engineered to have improved properties such as increased stability, reduced toxicity, and enhanced oxygen-carrying capacity. These molecules can bind to oxygen and release it to tissues, thereby providing oxygenation to the body. The use of HBOCs has been explored in various clinical settings, including trauma, surgery, and critical care.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because there is no widely recognized synthetic oxygen carrier made up of this substance.
* **Option B:** This option is incorrect because while perfluorocarbons (PFCs) are used as oxygen carriers in some medical applications, they are not the primary synthetic oxygen carrier made up of this substance.
* **Option C:** This option is incorrect because while albumin is an important protein in the body, it is not a synthetic oxygen carrier.

**Clinical Pearl / High-Yield Fact**
It is essential to note that while synthetic oxygen carriers hold promise, their use is still limited due to concerns about toxicity, immunogenicity, and efficacy. Further research is needed to develop safe and effective HBOCs for clinical use.

**Correct Answer:** D.