on
under
in
None of the above
Answer is Wrong!
Answer is Right!
The correct answer is A. on.
A picture can be on a wall in many ways. It can be hung on the wall with nails or screws, or it can be taped to the wall. It can also be a mural, which is a picture that is painted directly on the wall.
The other options are incorrect. A picture cannot be under the wall, because the wall is above the picture. A picture cannot be in the wall, because the wall is solid.
I hope this helps!