Q: 84 (CDS-I/2005)

Consider the following chemical compounds
1. Aluminium phosphide
2. Endosulfan
3. Malathion
4. Methyl bromide
Which of these are used as fumigants ?
question_subject: 
Science
question_year: 
2005
question_exam: 
CDS-I
stats: 
0,160,728,392,216,120,160