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Let X be a connected metric space with at least two points. Which of thefollowing is necessarily true?
Question

Let X be a connected metric space with at least two points. Which of thefollowing is necessarily true?

A.

X has finitely many points.

B.

X has countably many points but is not finite.

C.

X has uncountably many points.

D.

No such X exists.

Correct option is C

A connected metric space cannot be decomposed into two or more disjointnon-empty open subsets.

This implies that if the space is connected and has atleast two points,

it must :

1. Have infinitely many points.

2. Be uncountable (because a countableconnected space would violate the properties of being a connected metric space).

Thus: - X cannot have finitely many points because a finite metric spacecannot be connected

unless it has only one point. - X cannot have countablymany points but not be finite because

such a set cannot satisfy the conditionsof connectedness in a metric space.

Therefore, the only possibility is that X has uncountably many points.

Correct Answer : Option (C). 

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