The digit absent in the fore limbs of Frog is

Options

A. Pollex
B. Hallux
C. Index finger
D. Little finger

Answer

To solve the question "The digit absent in the forelimbs of Frog is," we will analyze the options provided and understand the anatomy of a frog's forelimbs.

### Step-by-Step Solution:

1. **Understand the Anatomy of Frog Forelimbs**:
- Frogs have forelimbs that consist of three main parts: the upper arm (brachium), the forearm (antebrachium), and the wrist and hand (manus).
- Frogs typically have four fingers on their forelimbs.

2. **Examine the Options**:
- **Caulex**: This term refers to the innermost digit of the forelimb, specifically the thumb in primates.
- **Helix**: This term refers to the innermost digit of the hind foot of certain animals, not relevant to frog forelimbs.
- **Index Finger**: This is the first finger of the human hand, corresponding to the second digit.
- **Little Finger**: This is the fifth digit and smallest finger of the human hand.

3. **Identify the Absent Digit**:
- In frogs, the digit that corresponds to the thumb (Pollux) is rudimentary and not externally visible. This means that while frogs have four fingers, they lack a fully developed thumb.
- Therefore, the digit that is absent in the forelimbs of frogs is the **Caulex**.

4. **Conclusion**:
- Based on the anatomical structure of frogs and the definitions of the options, the correct answer is **Caulex**.

### Final Answer:
The digit absent in the forelimbs of a frog is **Caulex**.

---