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

Why (D) is correct: The Medulla oblongata primarily controls vital involuntary functions such as heart rate, respiration, blood pressure, swallowing, and vomiting. It does not directly regulate body temperature. Body temperature regulation is primarily a function of the hypothalamus.

Why other options are wrong:

A) Cerebrum - Memory: The cerebrum is the largest part of the brain and is responsible for higher-level functions including memory, learning, voluntary movement, and sensory processing. This is a correct pairing.

B) Cerebellum - Equilibrium of body: The cerebellum is crucial for coordinating voluntary movements, maintaining posture, balance, and equilibrium. This is a correct pairing.

C) Olfactory lobes - Smell: The olfactory lobes (part of the cerebrum in humans, more prominent in other animals) are specialized for processing the sense of smell. This is a correct pairing.

Common Mistake: Students often confuse the functions of the medulla and hypothalamus, especially regarding vital involuntary actions and homeostatic regulations.

NEET Tip / Mnemonic: Remember that the Hypothalamus is the 'thermostat' of the body, regulating temperature, hunger, thirst, and sleep cycles. The Medulla handles the 'basics' like breathing and heart rate.

Correct Answer: (D)