<prompt> Which of the following drugs can cause exacerbation of psoriasis?MetforminInterferon alphaLithiumAll the above  <response>: Ans. is d i.e., All the above Drugs which cause exacerbation of psoriasiso Antimalarials chloroquineo NSAIDso Carbamazepineo IFN-ao Lithiumo b-blockerso Sodium valproateo Metformino Corticosteroids withdrawalo ACE inhibitorso AT-II antagonistso Calcium channel blockers 