Q: 7 (CDS-I/2006)

Consider the following airports
1. Amritsar
2. Guwahati
3. Thiruvananthapuram
4. Varanasi
Which of the above are designated as International Airports ?
question_subject: 
General Knowledge
question_year: 
2006
question_exam: 
CDS-I
stats: 
0,240,280,240,112,48,120