Question

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): Coffee is stimulating beverage
Reason (R): Stimulating effect of coffee is due to caffeine

• A. Both (A) and (R) are true and (R) is the correct explation of (A).
• B. Both (A) and (R) are true but (R) is NOT the correct explation of (A).
• C. (A) is true but (R) is false.
• D. (A) is false but (R) is true.

Hint:

Caffeine is a methylxanthine alkaloid that acts as a competitive antagonist of adenosine receptors, making it the primary stimulant compound in coffee, tea, and cocoa.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Stimulating beverages contain bioactive compounds that act on the human central nervous system to increase alertness, reduce fatigue, and boost metabolic activity.
Coffee is a widely consumed stimulating beverage obtained from roasted coffee beans (*Coffea arabica* or *Coffea canephora*).

Step 2: Detailed Explation:
Let us alyze both statements and their relationship:
- Assertion (A): Coffee is consumed worldwide primarily for its physiological effects, which include temporary alertness, increased concentration, and reduced fatigue.
Therefore, coffee is classified as a stimulating beverage.
Thus, Assertion (A) is true.
- Reason (R): Coffee contains caffeine, a tural methylxanthine alkaloid.
Caffeine acts as a central nervous system stimulant by binding to and blocking adenosine receptors in the brain.
Adenosine is a neurotransmitter that promotes sleep and relaxation.
By blocking these receptors, caffeine increases alertness, adreline secretion, and metabolic activity, producing the stimulating effect associated with coffee.
Thus, Reason (R) is true.
- Relationship: The stimulating effect described in Assertion (A) is directly caused by the chemical action of caffeine described in Reason (R).
Thus, Reason (R) provides the correct physiological explation for Assertion (A).

Step 3: Fil Answer:
Both statements are true, and the Reason correctly explains why coffee is classified as a stimulating beverage.
Hence, the correct option is (A).