This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neurotic, Stress Related and Somatoform Disorders, Subject name: Psychiatry
A 34 year old female comes to psychiatrist with complaints of ' always feeling worried'. She repos that she always feels anxious and irritable and that her sleep is worsening gradually. What is the likely diagnosis- 
Select and explain. 
A. Agoraphobia, B. Generalised anxiety disorder, C. Major depression, D. Dysthymia
B: Generalised anxiety disorder
Answer: B: Generalised anxiety disorder 
Explanation: Generalized anxiety disorder (GAD) is characterized by excessive, uncontrolled, and irrational worry about everyday things that is out of propoion to the actual source of the worry. The worry impairs function, as the patient typically catastrophizes and becomes overly concerned with normal issues of health, money, work, and relationships.