Which of the statements given above are correct?
1. P - waves are the first seismic waves to reach a place
2. S - waves travel only through liquids
3. Arrival time of P and S - waves is used to locate the epicentre
4. Richter scale is a logarithmic scale
A. 1, 2 and 3
B. 1, 3 and 4
C. 1 and 4
D. 3 and 4
Answer: Option B

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