**Core Concept**
The question pertains to the amount of cerebrospinal fluid (CSF), also known as liquor, present in the central nervous system. The **subarachnoid space** is a key area where CSF circulates. Understanding the dynamics of CSF production and absorption is crucial.

**Why the Correct Answer is Right**
The correct answer is related to the fact that the **subarachnoid space** contains a significant amount of CSF. This space surrounds the brain and spinal cord, and it is here that CSF is primarily found. The **cerebral ventricles** produce CSF, but it is the **subarachnoid space** where the volume of CSF is maximized due to its larger capacity.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because, although the ventricles produce CSF, they do not hold the maximum amount.
**Option B:** Incorrect as the **subarachnoid space** is the correct location for the maximum amount of CSF, not other options.

**Clinical Pearl / High-Yield Fact**
Remember, the **subarachnoid space** is crucial for diagnosing conditions like subarachnoid hemorrhage, where blood accumulates in this space.

**Correct Answer:** D. subarachnoid space