Which of the following is correct for tea?
A.Acidic and Nicotine
B.Alkaline and Caffeine
C.Alkaline and Nicotine
D.Acidic and Caffeine

Hint:In natural beverages like tea and coffee, there are many flavonoids that are responsible for the taste and the colour and these compounds help to differentiate between different species of tea. This includes a nervous system stimulant.

Complete step by step solution:
Caffeine is a type of alkaloid found in different types of tea in different amounts. Caffeine provides both advantages as well as disadvantages as it controls the central nervous system. While too much tea or coffee can cause harm to us, in controlled quantities, it has many good effects on our bodies. All the different kinds of tea are acidic in nature, when some are more acidic, some are less.

Hence, the correct answer is option D, Acidic and Caffeine.

Note:
Tea is rich in antioxidant polyphenols like catechins, flavonols, theaflavins, and thearubigins. These are phenolic compounds and different types of tea have different flavonoid contents. These phenolic compounds in the tea leaves are responsible for the antioxidant activity that can promote good health by scavenging free radicals harming the body.
Caffeine is the most important alkaloid found in the tea or nitrogen containing substance in the tea that gives a slight bitter taste to it. Known as the central nervous system stimulant, caffeine improves alertness and relaxes the muscles. Though the content of caffeine in tea is not as high as that in coffee, but, caffeine is known to induce panic attacks, headaches, etc.