Discussion

Explanation:

Here we need to find the option which can be inferred from the passage.

Option (d) can be eliminated since the membrance vibrates due to feeding electric current and not the other way round as mentioned in the option.

Option (c) is also not true as the author says the opposite of what is mentioned. Although grandfather clocks produce more entropy they are still less accurate.

Option (a): There is no mention of arrow of time with respect to atomic clocks.

Option (b): This is what the passage is about. 

Hence, option (b).

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