I am worried . . . . . . . . the exam. A. in B. about C. on D. of

The correct answer is: B. about

The word “about” is used to express concern or anxiety about something. In this case, the speaker is worried about the exam.

The other options are not as appropriate in this context.

• The word “in” is used to express location or position. For example, “I am in the exam room.”
• The word “on” is used to express a surface or location. For example, “The exam is on the table.”
• The word “of” is used to express possession or relationship. For example, “I am afraid of the exam.”

I hope this helps!