The correct option is A Gustatory, olfactory
The gustatory system is the sensory system for the sense of taste. The gustatory system allows humans to distinguish between safe and harmful food. Olfactory receptors expressed in the cell membranes of olfactory receptor neurons are responsible for the detection of odor molecules. Activated olfactory receptors are the initial player in a signal transduction cascade which ultimately produces a nerve impulse which is transmitted to the brain.