Q. Which of the following is/are matched correctly?
1. Earthquake's origin - seismic focus
2. Epicentre - point on earth's surface directly above seismic focus
3. S waves - similar to sound waves
4. Richter scale - severity of earthquake

• (A) 1, 2, 3
• (B) 1, 2, 3 and 4
• (C) 2 and 4
• (D) 3 and 4