<prompt> A woman presenting with abrupt onset of the worst headache of her life Which is the best investigation?NCCT of the headVessel carotid DopplerNo imagingMRI  <response>: Ans. a. NCCT of the HeadPatients with severe, sudden onset of a first-time headache accompanied by strong evidence for an underlying cause on history or physical examination should have a NCCT scan of the head to rule out any secondary causes. 