Step 1: Understanding the Concept:
This question verifies the correct calendar dates of key international environmental and scientific observance days.
Step 2: Detailed Explanation:
- Statement 1 is incorrectly matched: World Meteorological Day is observed on March 23 (celebrating the establishment of the WMO in 1950), not April 23.
- Statement 2 is correctly matched: World Forest (Forestry) Day is observed on March 21.
- Statement 3 is correctly matched: World Water Day is observed on March 22.
- Statement 4 is correctly matched: International Earth Day is observed on April 22.
Step 3: Final Answer:
Therefore, only statement 1 is incorrectly matched, making the correct option (A).