Find out whether there is any grammatical error in below sentence.
He fixed a metal ladder / for the wall below his window / so as to be able to / escape if there was a fire.

A. He fixed a metal ladder

B. for the wall below his window

C. so as to be able to

D. escape if there was a fire

E. No error

Answer: Option B

Solution(By Examveda Team)

to the wall below his window