Identify the vestigial organ in human body.

Options

A. Coccyx
B. Nictitating membrane of eye
C. Ear muscles
D. All the above

Explanation

**Step-by-Step Solution:**

1. **Understanding Vestigial Organs**: Vestigial organs are parts of the body that have lost their original function through the course of evolution. They may have been useful in our ancestors but are no longer functional in the current species.

2. **Analyzing the Options**:
- **Option 1: Coccyx**: The coccyx, or tailbone, is a remnant of a tail that was present in our primate ancestors. It serves no significant function in modern humans.
- **Option 2: Nictitating Membrane of the Eye**: This is a small fold of tissue in the corner of the eye. In some animals, it serves to protect the eye and keep it moist, but in humans, it is largely non-functional.
- **Option 3: Ear Muscles**: Humans have muscles around the ear that can move the ear slightly. However, these muscles are not used for any significant purpose in humans, unlike in some animals that can rotate their ears to better hear sounds.
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