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In this matching exercise, we are required to match the phenomenon listed in List I with their corresponding dates listed in List II.
List I:
A. Summer solstice
B. Winter solstice
C. Vernal Equinox
D. Autumnal Equinox
List II:
1. 21st June
2. 22nd December
3. 23rd September
4. 21st March
The correct matching option is Option 2, which is 1, 2, 4, 3.
Explanation of the correct answer:
1. Summer solstice, which is the longest day of the year, occurs on 21st June (Option 1).
2. Winter solstice, which is the shortest day of the year, occurs on 22nd December (Option 2).
3. Vernal Equinox, which marks the beginning of spring, occurs on 21st March (Option 4).
4. Autumnal Equinox, which marks the beginning of autumn, occurs on 23rd September (Option 3).
Therefore, based on the given dates and phenomena, Option 2 is the correct answer.
The provided answer is correct.