If ax +by + c = 0 and dx + ey + f = 0 represent the same straight line then which of following is necessarily satisfied?

If ax +by + c = 0 and dx + ey + f = 0 represent the same straight line then which of following is necessarily satisfied?

A.
a=d, b=e and c=f
B.
(a/d) = (b/e) = (c/f)
C.
ad+be+cf=0
D.
None of these

Correct Answer : B

Realated Questions

simplifies to
A rhombus has sides 10cm each and the circle that is inscribed in it has radius 1.5cm. What is the area of the rhombus in cm²
To comfortably sit in a room, every girl must be allowed a floor space of 2 sq.m. and air space of 5.5 cubic metres. Fifty girls are to be seated comfortably in a room 10m. long. What should be its height?