**Core Concept**
The question is testing the student's knowledge of the mechanism of action of various antibiotics. Specifically, it is assessing their understanding of how different antibiotics inhibit bacterial growth and replication. Inhibiting protein synthesis is a key mechanism by which some antibiotics exert their effects.

**Why the Correct Answer is Right**
Antibiotics that inhibit protein synthesis do so by binding to the ribosome, the cellular organelle responsible for protein synthesis. One such antibiotic is Tetracycline, which binds to the 30S subunit of the bacterial ribosome and inhibits the initiation of protein synthesis. This prevents the formation of the aminoacyl-tRNA complex, which is essential for the incorporation of amino acids into the growing protein chain. By inhibiting protein synthesis, Tetracycline effectively halts bacterial growth and replication.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because while Penicillin does inhibit bacterial growth, it does so by interfering with cell wall synthesis, not protein synthesis.

**Option B:** This option is incorrect because Aminoglycosides do inhibit protein synthesis, but they do so by binding to the 30S subunit of the ribosome, causing misreading of mRNA and leading to the incorporation of incorrect amino acids into the protein chain. This is different from the mechanism of action of Tetracycline.

**Option C:** This option is incorrect because Macrolides, such as Erythromycin, also inhibit protein synthesis by binding to the 50S subunit of the ribosome. However, they do so by blocking the exit tunnel, preventing the release of the completed protein chain.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that antibiotics with similar mechanisms of action can have overlapping side effects and interactions. For example, Tetracycline and Aminoglycosides can both cause nephrotoxicity, and Macrolides can increase the risk of QT prolongation.

**Correct Answer: A. Tetracycline**