longest gestation period is that of

Options

A. human being
B. camel
C. Rhino
D. salmandra atra.

Answer

### Step-by-Step Solution:

1. **Understand the Concept of Gestation Period**:
- Gestation period refers to the time from fertilization until the birth of the offspring. This is an important biological concept that varies significantly among different species.

2. **Evaluate the Options Provided**:
- The question provides several options to choose from regarding which species has the longest gestation period. We will analyze each option.

3. **Analyze Each Option**:
- **Option 1: Human Beings**: The gestation period for humans is approximately 9 months.
- **Option 2: Camels**: The gestation period for camels ranges from 15 to 16 months.
- **Option 3: Rhinos**: The gestation period for rhinoceroses is about 14 to 16 months.
- **Option 4: Salamandra atra**: This species of salamander has a gestation period that can last from 3 to 4 years.

4. **Compare the Gestation Periods**:
- From the analysis:
- Humans: 9 months
- Camels: 15-16 months
- Rhinos: 14-16 months
- Salamandra atra: 3-4 years (which is equivalent to 36-48 months)

5. **Determine the Longest Gestation Period**:
- Comparing all the gestation periods, Salamandra atra has the longest gestation period of 3 to 4 years.

6. **Conclude the Answer**:
- Therefore, the correct answer to the question "longest gestation period is that of" is **Option 4: Salamandra atra**.