Q. Consider the following statements:
1. Caffeine, a constituent of tea and coffee is a diuretic.
2. Citric acid is used in soft drinks.
3. Ascorbic acid is essential for the formation of bones and teeth.
4. Citric acid is a good substitution for ascorbic acid in our nutrition.
Which of the statements given above are correct?

• (A) 1 and 2, only
• (B) 1, 2 and 3 only
• (C) 3 and 4 only
• (D) 1, 2, 3 and 4