Examine the following statements and select the correct answer using the codes given below: 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.

Examine the following statements and select the correct answer using t

1.	Examine the following statements and select the correct answer using the codes given below: 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
Answer» D. 1, 2 and 3

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