Which of the following is not a category ?

Options

A. Panthera leo - Belongs to Class Mammalia
B. Musca domestica - The common house lizard, a reptile
C. Entamoeba coli - Commonly occurring protozoan in human intestine
D. Solanum tuberosum - A dicotyledonous plant

Explanation

To determine which of the following is not a category, we will analyze each option provided:

1. **Option A: Panthera leo belongs to class Mammalia**
- Panthera leo is the scientific name for the lion. The classification of Panthera leo indicates that it belongs to the class Mammalia, which is a valid taxonomic category. Therefore, this option is correct.

2. **Option B: Musca domestica the common house lizard or reptile**
- Musca domestica is actually the scientific name for the common house fly, not a lizard or reptile. The correct classification for Musca domestica is that it belongs to the phylum Arthropoda, which includes all insects. Since this option incorrectly identifies Musca domestica as a lizard or reptile, it does not represent a valid taxonomic category. Hence, this option is incorrect.

3. **Option C: Antamoeba coli commonly occurring protozoan in human intestine**
- Antamoeba coli is a protozoan that is found in the human intestine. Protozoa is a valid taxonomic category, and Antamoeba coli fits into this category. Thus, this option is correct.

4. **Option D: Solanum tuberosum a dicotyledonous plant**
- Solanum tuberosum is the scientific name for the potato plant, which is classified as a dicotyledonous plant. Dicotyledons are a valid category within the plant kingdom. Therefore, this option is also correct.

After analyzing all options, we find that **Option B** is not a category because it incorrectly identifies Musca domestica.

**Final Answer: Option B (Musca domestica the common house lizard or reptile) is not a category.**