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Subject :NSO    Class : Class 6

Which of the following are non-periodic changes?
I. Sunrise and sunset
II. Growth of plants
III. Occurrence of a rainbow
IV. Beating of heart

AII and III only
BII and IV only
CI and IV only
DAll of these.

Ans 1:

Class : Class 1

Ans 2:

Class : Class 8
the ans. is a

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