Arrange the following sequences of tumor development in the correct order?

Q. Arrange the following sequences of tumor development in the correct order?

1) Metastasis 2) Progression 3) Promotion 4) Initiation

A.            2, 3, 4, 1

B.            4, 3, 2, 1

C.            1, 2, 3, 4

D.            1, 3, 4, 2

Answer: 4, 3, 2, 1