The correct answer is (a) 4:25.
To find the mirror image of a clock, we can reflect the hands of the clock across a vertical line. This will swap the positions of the hour and minute hands. For example, if the time is 7:35, the hour hand will be pointing to 7 and the minute hand will be pointing to 3. After reflecting the clock, the hour hand will be pointing to 3 and the minute hand will be pointing to 7. This is the same as the time 4:25.
The other options are incorrect because they do not reflect the hands of the clock across a vertical line. For example, in option (b), the hour hand is still pointing to 7, but the minute hand is pointing to 2. This is not the same as the time 4:25.
In option (c), the hour hand is pointing to 4, but the minute hand is pointing to 3. This is not the same as the time 7:35.
In option (d), the hour hand is pointing to 5, but the minute hand is pointing to 3. This is not the same as the time 7:35.