ax + by +c1=0 এবং ax +by +c2=0 সরলরেখা দুইটির লম্ব দূরত্ব -
A
|c1+c2a2+b2|
B
|c1-c2a2+b2|
C
|c1+c2a2-b2|
D
|c1-c2a2-b2|
Correct Answer: |c1-c2a2+b2|