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Which of the following is WRONG?
A) The basic unit of time is second
B) The time period of a given pendulum is constant
C) Distance between two cities are measured in kilometres
D) None of the above.

Answer :

It’s D the time period within pendulums are constant, distance is always measured with kilometers within cities and basic unit is always seconds.

Answer:

D

Explanation:

•The unit of time is Second (sec) it is correct

•The time period of a given pendulum is constant because it depends on the length of the pendulum.

•And two cities are measured in kilometers

So None Of the Above!