The examples of social arrangement norms that contribute to unproductive behavior are:
A. ii, iv, v
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ii. Forming cliques and excluding some members from discussions. (Exclusion can lead to a lack of collaboration and communication, resulting in unproductive behavior.)
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iv. Spending time by discussing social issues over work-related matters. (This diverts focus from productive discussions and can lead to wasted time.)
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v. Meeting rarely with a study group and interaction with diverse classmates. (Infrequent meetings limit opportunities for collaboration and can hinder effective learning.)
Therefore, the correct answer is A. ii, iv, v.