**Core Concept:** Sabaroud's medium is a specific type of agar medium used for the selective isolation and differentiation of specific microorganisms. It is used to support the growth of fungi, particularly yeast. The medium is named after the French microbiologist Jean-Baptiste Doyen Sabaroud.

**Why the Correct Answer is Right:** Sabaroud's medium contains specific nutrients and supplements that promote the growth of yeast cells while inhibiting the growth of bacteria. It consists of glucose, yeast extract, peptone, and agar, along with various supplements like casein, tyrosine, and arginine. These supplements enable the selective isolation and differentiation of specific fungal species, particularly yeast.

**Why Each Wrong Option is Incorrect:**

A. Yeast is not specifically inhibited by this medium, making it incorrect.
B. This medium does not selectively inhibit bacteria while promoting yeast growth, making it incorrect.
C. The medium does not contain specific nutrients required for the growth of yeast cells, making it incorrect.
D. The medium does not contain tyrosine, which is essential for the growth of yeasts, making it incorrect.

**Clinical Pearl:** Sabaroud's medium is an essential tool for microbiologists and clinical microbiologists to isolate and identify yeast infections, particularly in cases of candidiasis. It helps differentiate between Candida species through their growth characteristics, color, and colony morphology. A positive result on Sabaroud's medium suggests a fungal infection, prompting further diagnostic investigations and treatment options.