<prompt> A 70 year old patient presents with dizziness and headache followed by left sided hemiparesis with right eye dilatation and ptosis. Most probable blood vessel damaged is:-Middle cerebral aeryAnterior communicating aeryPosterior cerebral aeryBasilar aery  <response>: Ipsilateral 3 CN palsy present along with ptosis CL Hemiparesis so Weber syndrome Cause: Lesion in Midbrain due to occlusion of P1 PCA Hemiplegia can occur due to occlusion in: MCA P1 PCA Basilar aery ant spinal aery 