Ichthyology is the science of study of :

Options

A. fishes
B. birds
C. reptiles
D. dinosaurs

Explanation

**Step-by-Step Solution:**

1. **Understanding the Term "Ichthyology":**
- The term "Ichthyology" is derived from Greek. The word "Ichthys" means fish, and "logos" means study. Therefore, Ichthyology literally translates to the study of fish.

2. **Identifying Related Fields:**
- To clarify the context, it's helpful to know the study of other animal groups:
- The study of birds is referred to as Ornithology.
- The study of reptiles is known as Herpetology.
- The study of dinosaurs falls under Paleontology.

3. **Selecting the Correct Option:**
- Given the definitions and related fields, the only option that aligns with the definition of Ichthyology is "fishes."

4. **Conclusion:**
- Therefore, the correct answer to the question is that Ichthyology is the science of the study of fishes.

**Final Answer:**
Ichthyology is the science of study of fishes.

---