A pendulum clock gives correct time at 20°C at a place where g= 10m/s². The pendulum consists of a light steel rod connected to a heavy ball. If it is taken to a different place where g = 10.01m/s² at what temperature the pendulum gives correct time (α of steel is 10^–5/°C)

• A

  30°C

• B

  60°C

• C

  100°C

• D

  120°C