Let vector a = 2i + λ1j + 3k, vector b = 4i + (3 - λ2)j + 6k and vector c = 3i + 6j + (λ3 - 1)k be three vectors such that vector b = 2a and vector a is perpendicular to c. Then a possible value of (λ1, λ2, λ3) is
(1) (1, 3, 1)
(2) (- 1/2, 4, 0)
(3) (1/2, 4, -2)
(4) (1, 5, 1)
