Q: 113 (CDS-I/2014)


Which of the following is /are direct source(s) of information about the interior of the earth?
1. Earthquake wave
2. Volcano
3. Gravitational force
4. Earth magnetism
Select the correct answer using the code given below.
question_subject: 
Geography
question_year: 
2014
question_exam: 
CDS-I
stats: 
0,880,1984,864,776,136,1088