Rearrange these parts which are labeled as P, Q, R, S to produce the correct sentence. Choose the proper sequence from the alternatives provided.
Colour Therapy is
P. evidence dating back thousands
Q. a complementary therapy for which there is
R. cultures of Egypt, China, and India
S. of years to the ancient,
1. SRPQ
2. RQPS
3. SQPR
4. QPSR