Correct Answer: Option B

Explanation

The term "endoplast" in the context of many standardized biology exams is often used interchangeably with or as a misprint for 

cnidoblasts(or nematocysts). These are specialized stinging cells located primarily on the tentacles of Hydra. Their primary functions include: 

Offence: Paralyzing and capturing prey by releasing toxins.

Defence: Protecting the organism from predators. 

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