<prompt> All are true regarding cluster headache except:Most common in malePeriorbital in locationBilateralSymptoms seen in early hours of the morning  <response>: Ans: C i.e. Bilateral Cluster headache Cluster headache shows a 5:1 predominance of males and onset is usually in the third decade The characteristic presentation of cluster headache is with periodic, severe, unilateral periorbital pain accompanied by unilateral lacrimation, nasal congestion and conjunctival injection, often with other features of Horners syndrome Typically, the patient develops these symptoms at a paicular time of day often in the early hours of the morning 