This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Stroke and TIA, Subject name: Medicine
A 44-year-old male presents with left arm and leg weakness. On assessment, he has significant weakness (MRC 2/5) of the left upper/lower limb in addition to sensory and visual neglect. He is treated for a right middle cerebral aery territory stroke. Which of the following investigation is likely to be least helpful in determining the cause of the stroke? 
Select and explain. 
A. EEG, B. Lipid profile, C. Carotid aery doppler, D. Autoimmune panel
A: EEG
Answer: A: EEG 
Explanation: Visual neglect- Coical feature / Coical stroke in the patient EEG is not recommended in cases of CVA. It is used in cases of Epilepsy and seizures. Lipid profile- tells us about atherosclerosis which is one of the leading cause for developing ischemic stroke. Carotid aery doppler- also helps to identify atherosclerosis Autoimmune panel- Antiphospholipid Ab syndrome (Recurrent aerial & venous thrombosis) also contribute to developing ischemic stroke, so can be used. These along with ECG, TTE/ TEE are recommended for diagnosing of acute cerebrovascular accident (CVA), coical stroke in MCA.