**Core Concept**
The total volume of cerebrospinal fluid (CSF) in an adult human is a critical parameter for understanding various neurological conditions. The volume of CSF is influenced by factors such as the rate of production, absorption, and reabsorption.

**Why the Correct Answer is Right**
The total volume of CSF in an adult human is approximately 125-150 ml. This volume is maintained by the balance between the rate of CSF production by the choroid plexus and the rate of CSF absorption by the arachnoid granulations. The CSF is produced at a rate of about 0.3-0.4 ml/min, and the total volume is replenished every 4-6 hours. The CSF circulation involves the formation, circulation, and absorption of CSF, which plays a crucial role in maintaining the homeostasis of the central nervous system.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not provide a specific volume of CSF.
**Option B:** This option is also incorrect as it does not match the established value for the total volume of CSF in an adult human.
**Option D:** This option is incorrect as it significantly underestimates the total volume of CSF.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the total volume of CSF is relatively small compared to the total volume of blood in the body, which highlights the critical role of CSF circulation in maintaining the homeostasis of the central nervous system.

**Correct Answer:** C. 150 ml.