Assertion (A): Quartz clocks are more accurate than pendulum clocks.
Reason ( R): Quartz clocks use periodic motion of simple pendulum for the measurement of time.

Options

A. S-I and S-II are correct and S-II is the correct explanation of S-I.
B. S-I and S-II are correct but S-II is not the correct explanation of S-I.
C. S-I is correct but S-II is wrong.
D. S-I is wrong but S-II is correct.

Answer

A

Explanation

Quartz clocks contain an electric circuit and are more accurate than pendulum clocks.