The image of a clock in a plane mirror shows a wrong time as 08:45. Assuming the clock did not have number markings on it, the correct time would be:

1. 4:15
2. 2:45
3. 3:15
4. 3:45

The correct option is C 3:15
Remember, an extended object like a clock will form a laterally inverted image in a plane mirror. That is, left and right will be interchanged. So, as the time the image clock shows is 8:45, it will look like:

Hence the real clock would look like: 

Hence, the correct time is 3:15.