The correct answer is A: on. When referring to a mark, picture, or any object attached or appearing on a surface, the preposition 'on' is used. 'On the wall' is the standard usage.
A.on✓ Correct
B.by
C.into
D.from
Explanation
When referring to a mark, picture, or any object attached or appearing on a surface, the preposition 'on' is used. 'On the wall' is the standard usage.
💡 Practice unlimited CDS PYQs + AI-tracked progress on each topic. Sign up free →