A patient who refuses to eat, saying that the food is poisoned, is an example of what?

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E6 Robert Boland, Marcia L. Verduin - Kaplan and Sadock's Comprehensive Text of Psychiatry-Wolters Kluwer Health (2024) (pp 1-16525 of 16525) pp. 3249-3251, 13421-13423
Practise the full Uttarakhand CHO - 2021
Attempt every question from this paper in a timed mock, then review the full solution for each one.