Q: 88 (CDS-I/2002)

With reference to atmospheric pressure, consider the fallowing statements:
1. Atmospheric pressure decreases towards poles
2. Atmospheric pressure decreases with altitude
3. High pressure is experienced over continents during winter
4. All deserts experience low pressure throughout the year
Which of these statements are correct?
question_subject: 
Geography
question_year: 
2002
question_exam: 
CDS-I
stats: 
0,1384,672,336,1384,120,216