The answer is the second choice
Chemoreceptor is a specialized sensory receptor cell, which responds to a chemical substance and generates a biological signal.
The type of chemoreceptor responsible for our sense of smell is called olfactory receptor. It is also known as odorant receptor, these are found in a small patch of tissue high inside the nose. These cells directly connected to the brain.
B-monomer
I am not sure about the second one but i think it's C
<span>The part of the nephron conserves water and minimizes the volume of urine </span>loop of henle.
