Which of the following are a basis for R³?

a) (1,1,1), (1,2,1)
b) (1,1,1), (1,2,1), (1,0,1)
c) (6,3,9), (5,2,8), (4,1,7)
d) (1,1,1), (1,2,1), (1,0,0)