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 young female presents with history of abdominal pain, headache, nausea and vomiting and sudden loss of movement of right upper limb. What is the most likely diagnosis? 
Select and explain. 
A. Conversion disorder, B. Migraine, C. Right lower limb paralysis, D. Acute (AIP) intermittent porphyria
D: Acute (AIP) intermittent porphyria
Answer: D: Acute (AIP) intermittent porphyria 
Explanation: The history of a young female presenting with abdominal symptoms and sudden neurological symptoms should raise the suspicion for AIP. AIP is an impoant differential diagnosis of conversion disorders. Conversion disorders are usually precipitated by a psychological stressor and present with altered voluntary motor or sensory symptoms. History of abdominal pain and other GI symptoms is not usually seen and their presence is more consistent with the diagnosis of AIP.