Concept: This question tests your knowledge of the different parts of the human brain and their specific functions, focusing on identifying an incorrect pairing.

Why (D) is incorrect: The limbic system is primarily involved in emotional responses, motivation, memory, and olfaction. While it has interconnections, its primary function is not controlling movement, nor is it solely composed of fiber tracts interconnecting different brain regions. The control of movement is largely handled by the motor cortex, basal ganglia, and cerebellum.

Why other options are correct:

• (A) Medulla oblongata: Correctly controls vital involuntary functions like respiration, cardiovascular reflexes, and gastric secretions.
• (B) Corpus callosum: Correctly described as a large band of myelinated nerve fibers that connects the left and right cerebral hemispheres, allowing communication between them.
• (C) Hypothalamus: Correctly functions in producing releasing and inhibiting hormones, regulating body temperature, hunger, thirst, and various other homeostatic functions.

Common Mistake: Students often confuse the functions of the limbic system with those of the basal ganglia or cerebellum, which are more directly involved in motor control.

NEET Tip / Mnemonic: Remember the '4 F's' for the hypothalamus: Feeding, Fighting, Fleeing, and Fornication (sexual activity), along with temperature regulation and hormone release.

Correct Answer: (D)