What is the best time to give oral psoralen with UVA?: (A) Half n hour before UVA, (B) 1 hour before UVA, (C) Half n hour after UVA, (D) 1 hour after UVA
Answer is B. Ans is'b' i.e. 1 hour before UVA Psoralens (mostly 8- MOP) is given orally 1-3 hours (average 2 hours) before exposure to UVA.