Sushma has a dentist appointment at 7 : 20 in the evening. While entering the dentist's office, she saw reflection of the wall clock. The hands of clock read 4 : 40. She knew that this being the reflection of the clock, the time she read is not the correct time. She is not on appointed time.

• A. she is 20 minutes late
• B. She is 20 minutes before
• C. She is on time
• D. None of the above