Ink glands for protection and locomotion by jet propulsion mechanism is a characteristic feature of

Options

A. Pila (apple snail)
B. Loliga (Squid)
C. Dertalium (tusk shell)
D. Chaetopleura (chiton)

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question:** The question asks about the organism that has ink glands for protection and uses a jet propulsion mechanism for locomotion.

2. **Identifying Key Features:** The key features mentioned are:
- Ink glands: These are used for protection, typically to confuse predators.
- Jet propulsion: This is a method of locomotion where water is expelled from the body to move quickly in the opposite direction.

3. **Identifying the Phylum:** The features of ink glands and jet propulsion are characteristic of organisms in the phylum Mollusca.

4. **Classifying the Organisms:** Within the phylum Mollusca, the class Cephalopoda includes organisms such as squids, octopuses, and cuttlefish. These organisms possess both ink glands and the ability to move using jet propulsion.

5. **Analyzing the Options:**
- **Pila (Apple snail):** This is not a cephalopod; it does not have ink glands or jet propulsion.
- **Loliga (Squid):** This is a cephalopod and does possess both ink glands and jet propulsion.
- **Dertalium and Ketoplura:** These are also not cephalopods and do not have the mentioned features.

6. **Conclusion:** The correct answer is **Loliga (Squid)**, as it is the only option that fits the criteria of having ink glands and using jet propulsion for locomotion.

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