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
Person experiencing fear when he travels by bus alone is a case of 
Select and explain. 
A. Generalized anxiety disorder, B. Panic disorder, C. Agoraphobia, D. All the above
A: Generalized anxiety disorder
Answer: A: Generalized anxiety disorder 
Explanation: (A) Generalized anxiety disorder # Symptoms of ANXIETY:# Physical Symptoms:> Motor Symptoms: Tremors; Restlessness; Muscle twitches; Fearful facial expression> Autonomic and Visceral Symptoms: Palpitations; Tachycardia; Sweating; Flushes; Dyspnea; Hyperventilation; Constriction in the Chest; Dry mouth; Frequency and hesitancy of micturition; Dizziness; Diarrhea; Mydriasis# Psychological Symptoms:> Cognitive Symptoms: Poor concentration; Distractibility; Hyperarousal; Vigilance or scanning; Negative automatic thoughts> Perceptual Symptoms: Derealization; Depersonalization.> Affective Symptoms: Diffuse, unpleasant, and vague sense of apprehension; Fearfulness; Inability to relax; Irritability; Feeling of impending doom (when severe)> Other Symptoms: Insomnia (initial); Increased sensitivity to noise Exaggerated startle response