Answer: Green Tea
Explanation:
Caffeine is a stimulant which stimulates the central nervous system. It is the world's most widely used psychoactive drug.
It is legal to have caffeine and it is not regulated in almost every part of the world. It is found in cola, coffee, black tea.
Green tea has no caffeine in it. It is completely free from calories, caffeine. It is good for health as it has antioxidants in it.
