Cranial capacity is minimum in

Options

A. Chimpanzee
B. Gorilla
C. Rhesus monkey
D. Orangutan

Answer

To determine which species has the minimum cranial capacity from the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Cranial Capacity**:
- Cranial capacity refers to the volume of the interior of the skull, which is an indirect measure of brain size. It is typically measured in cubic centimeters (cc).

2. **Know the Average Cranial Capacities**:
- Modern humans: 1400 to 1500 cc
- Chimpanzee: 275 to 500 cc
- Gorilla: 340 to 750 cc
- Rhesus monkey: approximately 200 cc
- Orangutan: similar to chimpanzee, up to 500 cc

3. **Compare the Cranial Capacities**:
- From the data:
- Chimpanzee: 275 to 500 cc
- Gorilla: 340 to 750 cc
- Rhesus monkey: 200 cc
- Orangutan: up to 500 cc
- The Rhesus monkey has the lowest cranial capacity at approximately 200 cc.

4. **Identify the Correct Answer**:
- Based on the comparison, the species with the minimum cranial capacity is the Rhesus monkey.

### Final Answer:
Cranial capacity is minimum in the Rhesus monkey.