Assertion: Human has dicondylic skull.
Reason: Skull articulates with superior region of the vertebral column with the help of two occipital condyles.

Options

A. If both assertion and reason are ture and reason is the corect explanation of assertion
B. If both assertion and reason are ture but reson is not the correct explanation of assertion
C. If assertion is true reason is false
D. If both assertion and reason are false

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that humans have a dicondylic skull. The term "dicondylic" refers to a skull structure that has two occipital condyles.

2. **Understanding the Reason**: The reason provided explains that the skull articulates with the superior region of the vertebral column through these two occipital condyles.

3. **Analyzing the Assertion**: In humans, the skull does indeed have two occipital condyles. These are rounded projections on the occipital bone at the base of the skull.

4. **Analyzing the Reason**: The occipital condyles allow the skull to connect to the first cervical vertebra (the atlas). This connection is essential for the nodding motion of the head.

5. **Conclusion**: Since both the assertion (that humans have a dicondylic skull) and the reason (that the skull articulates with the vertebral column via two occipital condyles) are true, and the reason correctly explains the assertion, we conclude that the answer is option A: both assertion and reason are true, and the reason is the correct explanation for the assertion.

**Final Answer**: Option A - Both assertion and reason are true, and the reason is the correct explanation for the assertion.

---