for
of
by
on
Answer is Right!
Answer is Wrong!
The correct answer is of.
The preposition “of” is used to indicate that someone is accused of doing something. In this case, the speaker is accusing the person of stealing the pen.
The other options are not correct because they do not make sense in the context of the sentence.
- “For” is used to indicate a reason or purpose. For example, “I bought the pen for my friend.”
- “By” is used to indicate the person or thing that does something. For example, “The pen was stolen by the thief.”
- “On” is used to indicate a location or position. For example, “The pen is on the table.”