Consider the following statements regarding neuroglial (glial) cells in the human nervous system: 1. Oligodendrocytes form the myelin sheath around axons in the Central Nervous System, whereas Schwann cells perform this function in the Peripheral Nervous System. 2. Astrocytes contribute to the formation of the blood-brain barrier (BBB) and help regulate the chemical environment around neurons. 3. Microglia function as the resident macrophages of the Central Nervous System, performing phagocytosis to clear cellular debris and pathogens. Which of the statements given above are correct?

Options:

• A: 1 and 2 only
• B: 2 and 3 only
• C: 1, 2 and 3
• D: 1 and 3 only

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