Write your name and roll number . . . . . . . . top of the page. A. at B. at the C. on D. on the

The correct answer is: C. on

The preposition “on” is used to indicate a position on a surface. In this case, the surface is the top of the page. The other prepositions, “at” and “at the,” are not as specific. “At” can be used to indicate a location or a position in time. “At the” is a more formal version of “at.”

Here are some examples of how the preposition “on” can be used:

• The book is on the table.
• The pen is on the desk.
• The picture is on the wall.
• The bird is on the branch.
• The sun is on the horizon.

I hope this helps!