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Kavita decorated her home beautifully wi...

Kavita decorated her home beautifully with lights on Diwali. She had three strings of blinking lights with different light colours. The lights of first string remain off for 3 seconds, the second string for 5 seconds and the third string for 6 seconds.

The time interval after which lights of the three strings will glow again after switching them on at the same time is:

A

10 seconds

B

30 seconds

C

60 seconds

D

90 seconds

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