The correct option is D Tongue.
The five tastes received by gustatory receptors are salty, sweet, bitter, sour, and umami, which means delicious in Japanese. According to Lindemann, both salt and sour taste mechanisms detect, in different ways, the presence of sodium chloride in the mouth.The sense of taste is transduced by taste buds, which are clusters of 50-100 taste receptor cells located in the tongue, soft palate, epiglottis, pharynx, and esophagus. The tongue is the main sensory organ of the gustatory system.
Therefore, the correct answer is option D.