
Question 2/5
Q2. Consider the following pairs:
| Disease |
Cause |
| 1. Blue baby syndrome |
Nitrate pollution |
| 2. Yokkaichi asthma |
Sulfur oxide pollution |
| 3. Pneumoconiosis |
Coal dust |
| 4. Itai Itai |
Mercury pollution |
How many of the above pairs are correctly matched?