<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 4-year-old boy is brought to the physician because of a progressive headache and neck pain for 2 weeks. During this period, he has had multiple episodes of dizziness and tingling sensations in his arms and hands. A year ago, he underwent closed reduction of a dislocated shoulder that he suffered after a fall. He underwent surgical removal of a sac-like protuberance on his lower back, soon after being born. His temperature is 36.7C 98F, pulse is 80min, and blood pressure is 10080 mm Hg. His neck is supple. Neurological examination shows sensorineural hearing loss bilaterally and normal gross motor function. Fundoscopy reveals bilateral optic disk swelling. An MRI of the brain is shown. Which of the following is the most likely cause of this patients symptoms?? A: Medulloblastoma, B: Intraventricular hemorrhage, C: Chiari II malformation, D: Vestibular schwannoma, E: Brachial plexus injury,  <response>: Based on the information provided in the question stem, this appears to be a case involving a 4-year-old boy with progressive headache, neck pain, episodes of dizziness and tingling sensations in his arms and hands over the past 2 weeks. Key details from his history include: - Underwent closed reduction of a dislocated shoulder a year ago after a fall- Underwent surgical removal of a sac-like protuberance on his lower back soon after birth- Physical exam findings: sensorineural hearing loss bilaterally, optic disk swelling on fundoscopy- MRI of the brain providedThe history of a sac-like protuberance likely a meningocele removed after birth along with the physical exam findings of sensorineural hearing loss and optic disk swelling point towards a likely diagnosis of Chiari II malformation. The MRI image provided also shows characteristic findings of Chiari II malformation including downward displacement of the cerebellar tonsils and hydrocephalus.Of the answer choices provided, Chiari II malformation best fits the clinical presentation in this patient.C: Chiari II malformation 