Question

Match List I with List II.
List I List II
A) Greenhouse effect 1. Respiration
B) Oxygen 2. Keeping food items fresh
C) Nitrogen 3. Nitric acid and sulphuric acid
D) Acid Rain 4. Carbon dioxide

• A. A - 4, B - 1, C - 2, D - 3
• B. A - 1, B - 2, C - 3, D - 4
• C. A - 2, B - 3, C - 4, D - 1
• D. A - 3, B - 2, C - 1, D - 4

Answer 1

The correct option is A A - 4, B - 1, C - 2, D - 3

option A is correct.
Carbon dioxide is a greenhouse gas and causes the greenhouse effect.
Oxygen is an important gas found in our atmosphere. Living things use oxygen for respiration.
Nitrogen has a low freezing point, thus it is used in keeping food item fresh.
Sulphuric acid and Nitric acid causes acid rain.