Hymenolepis nana is

Options

A. dog tapeworm
B. Dwarf tapeworm
C. Pork tapeworm
D. Dead man's finger

Answer

To determine what Hymenolepis nana is, we can follow these steps:

### Step 1: Identify the Organism
Hymenolepis nana is a type of tapeworm. It belongs to the class Cestoda, which includes flatworms that are typically parasitic.

**Hint:** Look for the classification of Hymenolepis nana to understand its biological category.

### Step 2: Understand the Common Names
Hymenolepis nana is commonly known as the "dwarf tapeworm." This name reflects its small size compared to other tapeworms.

**Hint:** Remember that many organisms have common names that can help identify them more easily.

### Step 3: Review the Options
The question provides four options:
1. Dog tapeworm
2. Dwarf tapeworm
3. Pork tapeworm
4. Dead man's finger

We need to match Hymenolepis nana with one of these options.

**Hint:** Compare the scientific name with the common names provided in the options.

### Step 4: Eliminate Incorrect Options
- **Dog tapeworm**: This is not correct; it refers to a different species, often associated with dogs.
- **Pork tapeworm**: This is also incorrect; it refers to Taenia solium, which is associated with pigs.
- **Dead man's finger**: This is incorrect as it refers to Xylaria polymorpha, a type of fungus.

**Hint:** Use the process of elimination to narrow down the correct answer.

### Step 5: Confirm the Correct Answer
The only option that matches Hymenolepis nana is the "dwarf tapeworm." Therefore, the correct answer is option 2.

**Hint:** Always double-check your final answer against the information you've gathered.

### Final Answer
Hymenolepis nana is the dwarf tapeworm.