This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
The sensory system that has the most direct connection to brain is? 
Select and explain. 
A. Taste, B. Smell, C. Vision, D. Hearing
B: Smell
Answer: B: Smell 
Explanation: The olfactory system, or sense of smell, is the pa of the sensory system used for smelling (olfaction). Most mammals and reptiles have a main olfactory system and an accessory olfactory system. The main olfactory system detects airborne substances, while the accessory system senses fluid-phase stimuli. The senses of smell and taste (gustatory system) are often referred to together as the chemosensory system because they both give the brain information about the chemical composition of objects through a process called transduction.Ref: Ganong&;s review of medical physiology 23rd edition Page no: 220