The equation of a sphere passing through the points (3, 0, 0),

(0, -1, 0), (0, 0, -2) and having its center on the plane 3x + 2y + 4z = 1, is:

1. 6(x + y + z ) - 16x + 9z - 6 = 0

2. 6(x + y + z ) - 8x + 3z - 3 = 0

3. 6(x + y + z ) - 16x + 6z - 5 = 0

4. None of these