1. Air masses that form over land would be mostly

A. Warm
B. Cold
C. Dry*
D. Wet

2. Air masses that form over oceans or seas would be mostly

A. Warm*
B. Cold
C. Dry
D. Wet

3. Air masses that form over northern locations would be mostly

A. Warm
B. Cold*
C. Dry
D. Wet

4. Air masses that form over tropical regions would be mostly

A. Warm
B. Cold
C. Dry
D. Wet*

5 answers

2 and 4 are wrong.
Would 2 be wet and 4 be warm?
Although this is not my area of expertise, those last choices sound better.
2 n 4 wrong
2 and 4 wrong