Which one of the following is the correct matching of three items and their grouping category?

Question

Accepted Answer

A. 1. **Recall the structure of the pelvic girdle.**

The **pelvic girdle** is formed by **two innominate bones (hip bones)**.

2. **Recall what makes up each innominate bone.**

Each innominate bone itself consists of **three separate bones**: the **ilium, ischium, and pubis**.

3. **Match this with option A.**

Since ilium, ischium, and pubis together form the **coxal bones of the pelvic girdle**, option A is correctly matched.

4. **Check the other options.**

**Rhodopsin** is a visual pigment, not a muscle protein, making option B's grouping incorrect; **thiamine** is a vitamin, not a pyrimidine (making option C incorrect); and **cochlea** is part of the inner ear related to hearing, not an ear ossicle like malleus and incus (making option D incorrect).

Hence, the answer is **Option A**.