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In any group, the number of improper subgroups is 

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  1. 2
  2. 3
  3. depends on the group
  4. 1

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Option 1 : 2
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Concept:

If G is a group, then the subgroup consisting of G itself is the improper subgroup of G. All other subgroups are proper subgroups

In any group, the number of improper subgroups is 2

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