The document discusses different levels of evidence in medicine and provides examples of types of arranged marriages that correspond to these levels. Level V evidence includes an astrologer bringing a proposal or parents agreeing on a match. Level IV evidence is choosing a partner from options selected by parents. Level III evidence involves case-control studies, such as choosing a homemaker versus working spouse. Level II evidence includes choosing a partner from colleagues followed by marriage. Level I evidence, the strongest, consists of high-quality randomized trials or a meta-analysis of marriage bureau profiles.