This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Psychiatry
Thyrotoxicosis is most commonly associated with 
Select and explain. 
A. Anxiety, B. Paranoid states, C. Mania, D. Delirium
A: Anxiety
Answer: A: Anxiety 
Explanation: (A) Anxiety # ACUTE ANXIETY:# Physical Symptoms:> Motoric Symptoms: Tremors, Restlessness, Muscle twitches, Fearful facial expression> Autonomic & Visceral Symptoms: Palpitation, Tachycardia, Sweating, Flushes, Dyspnea, Hyperventilation, Dry mouth, Frequency and hesitancy of micturition.; Dizziness, Diarrhea, Mydriasis.> Psychic Symptoms: Cognitive Symptoms: Poor concentration, distractibility, Hyperarousal, Vigilance or scanning; Perceptual Symptoms: Derealization, Depersonalization; Affective Symptoms: Diffuse, unpleasant, vague sense of apprehension, Fearfulness, Inability to relax, irritability, Feeling of impending doom (When severe);> Other Symptoms: Insomnia (initial), Exaggerated striate response.