## **Core Concept**
The question tests knowledge of cranial sutures, specifically the one located between the parietal and occipital bones. Cranial sutures are fibrous joints that connect the bones of the skull.

## **Why the Correct Answer is Right**
The **lambdoid suture** is located at the back and lower part of the skull, and it is the suture that articulates the parietal bones with the occipital bone. The name "lambdoid" comes from its resemblance to the Greek letter lambda (λ). This suture is crucial for the structural integrity of the posterior aspect of the skull.

## **Why Each Wrong Option is Incorrect**
* **Option A:** The **coronal suture** is located between the frontal and parietal bones, making it incorrect for this question.
* **Option B:** The **sagittal suture** runs along the midline of the skull, between the two parietal bones, which does not match the description.
* **Option D:** The **squamous suture** (or **squamous part of the temporal bone's suture**), involves the temporal bone, not the parietal and occipital bones.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that cranial sutures are important landmarks in neurosurgery and for assessing skull fractures. The lambdoid suture, in particular, is significant because it is often associated with posterior fossa surgeries.

## **Correct Answer:** . lambda suture