Tsunami

Q. Read the following sentences and choose the correct option that best describes these sentences:
1. A tsunami can be caused by underwater disturbances like earthquakes or landslides under oceans.
2. A tsunami is a small wave that does not cause any harm.

1. Sentence 1 is correct and sentence 2 is wrong.
2. Both sentences are wrong.
3. Both sentences are correct.
4. Sentence 1 is wrong and sentence 2 is correct.