Correct Idiom Just As...So.
Like cannot be followed by clause so Just Like..So is wrong. Thereby D, and E is wrong.
C is wrong because first "it" has no referent.
B "Just as with" does not parallel "so support".
IMO A. But it will be better if it said "Just as the"..."So the".
abhijit man..shed some light on the pronoun "it" issue you seem to have it nailed..i am struggling with this concept at times...
It is referring to "linux" replace "it" by Linux and the sentence following C will read as following:
Linux has been that support for linux within the industry has been growing.
Above sentence is obviously very awkward construction. Thereby C cannot be the answer.
Can you post the OA?