Which of the following is present in the skin of frog?
(a) Serous gland
(b) Mucus gland
(c) Chromatophore cells
(d) All of these

Options

A. Serous gland
B. Mucus gland
C. Chromatophore cells
D. All of these

Answer

To determine which of the following is present in the skin of a frog, we need to analyze each option provided:

1. **Understanding the options**:
- (a) Serous gland
- (b) Mucus gland
- (c) Chromatophore cells
- (d) All of these

2. **Analyzing each option**:
- **Serous gland**: These glands are not typically found in the skin of frogs. Frogs primarily have mucous and poison glands.
- **Mucus gland**: This type of gland is present in the skin of frogs. Mucous glands are multicellular and secrete mucin, which helps keep the skin moist and protects it from harmful bacteria.
- **Chromatophore cells**: These are pigment-containing cells that are involved in coloration but are not classified as glands. They are present in the skin of frogs but do not fall under the category of glands.
- **All of these**: This option suggests that all the previous options are present in the skin of frogs, which is incorrect since serous glands are not present.

3. **Conclusion**:
- The only correct option that is present in the skin of frogs is (b) Mucus gland. Therefore, the answer to the question is (b) Mucus gland.