Clustering groups

Hi,

is there a way in R to identify those cluster methods / distance measures
which best reflect predefined cluster groups.

Given 10 observations O1...O10. Optimally, these 10 observations cluster as
follows:
cluster1: O1, O2, O3, O4
cluster2: O5, O6
cluster3: O7, O8, O9, O10.

What I want is a method which identifies that cluster method / distance
measure which best reflect my predefined groups.

Is that somehow possible to do?
Cheers

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