| 1. A front is formed when air masses with different characteristics meet each other. |
| 2. A front is a sharp boundary between two air masses. |
| 3. A front formed between polar and tropical air masses is known as polar front. |
A) 1 and 2
B) 2 and 3
C) 1 and 3
D) 1, 2 and 3
Correct Answer: C
Solution :
A front is not a sharp boundary but a transitional zone between two air masses of different properties.
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