Final answer:
The source of mistrust that is not correct among the options provided is (3) Trustworthiness, as it is the antithesis of mistrust, whereas lack of communication and deception are actual sources of mistrust.
Step-by-step explanation:
Mistrust in social relationships can indeed stem from multiple sources, impacting communication and collaboration among individuals and groups. When assessing which of the given options is not a source of mistrust, it is clear that trustworthiness itself is not a source of mistrust. In fact, trustworthiness is the antithesis of mistrust and would tend to reduce or prevent it. The other options provided: a lack of communication, which can lead to misunderstandings and suspicion, and deception, which directly destroys trust, are both common sources of mistrust. Therefore, the answer to the question, "Mistrust may arise from three sources, which of the following is NOT one of these?" would be (3) Trustworthiness.