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answer is C.

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Detailed Solution

Concept- Calculate the angle of each part in the clock. Now,

o’clock will lie between the angle of

o’clock and

o’clock. Subtract the angle of

o’clock from

o’clock. When minute hand will move to

,hour hand will also move subtract that angle from the required angle.
A complete circle makes

and there are

portions in a clock.
Therefore, each portion makes

As we know that,

o’clock is between

o’clock and

o’clock. Where

o’clock makes

and

o’clock makes

angle.
When minute hand will rotate

minutes, then hour hand will rotate

Now, the angle at

o’clock is the difference between the angle at

o’clock and the sum of angle at

o’clock, angle of hour hand rotation.
Angle at

o’clock

Hence, the correct answer is option (3) .

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