English grammar – Spot the error (choose the part with an error or “No error”). Sentence: He fixed a metal ladder / for the wall below his window / so as to be able to / escape if there was a fire.

Introduction / Context:
This item tests correct preposition choice with “fix/attach” plus a surface. English uses “to” (attached to a surface), not “for,” when indicating the object of attachment.

Given Data / Assumptions:

• The ladder is physically affixed to a wall.
• Segment B uses “for the wall …,” which implies purpose rather than attachment.
• Other segments are grammatically fine.

Concept / Approach:
Use “fix/attach something to a wall/fence/door.” The preposition “for” marks benefit or purpose (“a ladder for escape”), not physical connection. Hence the correct collocation is “to the wall.”

Step-by-Step Solution:

Verification / Alternative check:

Why Other Options Are Wrong:

Common Pitfalls:

Final Answer:
for the wall below his window