The correct option is B four types
There are four main types of taste sensations bitter, salty, sweet, and sour. Recently, scientific experiments have proven that there are five tastes which include a new sensation called umami (savoury).Taste sensations are transduced by taste cells located in bunches called taste buds. They are found throughout the entire mouth but are highly concentrated on the tongue, the major sensory organ of the gustatory system. Taste buds are able to differentiate among different tastes through detecting interaction with different molecules or ions.