Sentence Correction - Verbal and Reasoning

Directions to SolveWhich of phrases given below each sentence should replace the phrase printed inboldtype to make the grammatically correct? If the sentence is correct as it is, mark 'E' as the answer.
Q1:

Had I realised how close I was to the edge of the valley, I would not have carried the bags there.

A Had I been realised

B If I would have realised

C When I realised

D Had I had realised

E No correction required

ANS:E - No correction required

No answer description is available.