<prompt> All of the following are causes of primary headache EXCEPT:MigraineTension headacheCluster headacheSinusitis  <response>: Ans. d SinusitisRef: Harrison 18th edition,chapter 14Primary HeadacheSecondary HeadacheType Type Tension -Type 69Systemic infection 63Migraine 16Head injury 4Idiopathic stabbing 2Vascular disorders 1Extertional 1Subarachnoid hemorrhage 1Cluster 0.1Brain tumor 0.1 