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Q. State which of the following is/are true?
I. The set of animals living on the Earth is finite.
II. The set of circles passing through the origin $(0,0)$ is infinite.

Sets

Solution:

We do not know the number of animals living on the Earth, but it is some natural number. So, the set of animals living on the Earth is finite. There are infinite circles passing through the origin $(0,0)$. So, the set of circles passing through the origin $(0,0)$ is infinite.