Now you will consider agglomerative hierarchical clustering with complete linkage as the measure of cluster similarity. To initialize, there are $6$ clusters, each cluster contains one house record. In iteration $1,$ which two clusters will be grouped together?

Group of answer choices

Cluster of house $3$ and cluster of house $5$

Cluster of house $4$ and cluster of house $2$

Cluster of house $1$ and cluster of house $6$

A or B