This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
Odour receptors are present in: 
Select and explain. 
A. Olfactory epithelium, B. Olfactory tract, C. Amygdala, D. Olfactory bulbs
A: Olfactory epithelium
Answer: A: Olfactory epithelium 
Explanation: The Sense of Smell. Smell depends on sensory receptors that respond to airborne chemicals. In humans, these chemoreceptors are located in the olfactory epithelium -- a patch of tissue about the size of a postage stamp located high in the nasal cavity.