Which of the following is NOT one of the four primary tastes

A)  sour
B)  spicy 
C)  salty
D)  sweet

Spicy is not considered one of the four primary tastes. It is actually the sensation of heat or pungency caused by certain compounds such as capsaicin. The four primary tastes are sweet, sour, salty, and bitter. Recently, some scientists have suggested adding a fifth taste, umami, which is a savory or meaty taste.