Consider the following :
1. The presence of moisture and a fall in the temperature are key factors for the formation of fog.
2. The Indo-Gangetic Plain is most vulnerable to fog occurrences in the months of December and January.
3. Freezing fog is mostly found in Indo Gangetic Plain.
Which of the above is/are incorrect?
1
1 only
2
2 only
3
3 only
4
1, 2 and 3