Consider the following statements:
1. Sowa-Rigpa was introduced in India by the Arabs.
2. Naturopathy is a medical system based on the law of minimum dose.
3. Unani system of medicine originated in ancient Egypt.
4. In the Siddha medicinal system, mercury has found a significant place for usage in therapeutics.
5. Yoga focuses on bringing harmony between mind and body.
Which of the statements given above are correct?