An ape having ischial callosities is

Options

A. Gibbon
B. Orang Utan
C. Gorilla
D. Chimpanzee.

Answer

To solve the question "An ape having ischial callosities is", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Term "Ischial Callosities":**
- Ischial callosities are hardened areas of skin found on the buttocks of some primates, including certain apes. They provide support and comfort when sitting.

2. **Identify the Apes with Ischial Callosities:**
- Among the various types of apes, we need to determine which ones possess ischial callosities. This feature is typically found in some lesser apes.

3. **Consider the Options:**
- The question likely provides multiple-choice options. From the context, we can infer that the options include Gibbons, Orangutans, Gorillas, and Chimpanzees.

4. **Analyze Each Option:**
- **Gibbon:** Known to have ischial callosities. They are small, primitive apes found in regions like the Assam hills.
- **Orangutan:** Does not have ischial callosities.
- **Gorilla:** Typically does not have ischial callosities.
- **Chimpanzee:** Also does not have ischial callosities.

5. **Select the Correct Answer:**
- Based on the analysis, the correct answer is **Gibbon**, as it is the only ape listed that possesses ischial callosities.

### Final Answer:
The ape having ischial callosities is **Gibbon**.

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