<prompt> A 23-year-old individual who believes in megavitamins therapy develops severe headche, fundoscopy reveals papilloedema. The likely cause for this problem is -Vitamin B12 intoxicationVitamin A intoxicationVitamin E intoxicationVitamin K intoxication  <response>: Vitamin A toxicity causes nausea ,increased intracranial pressure and Papilloedema due to high dose of retinol . Ref Harrison 20th edition pg 86 