<prompt> Which is true of ivermectinIt is the most effective drug for strongyloidiasisIt is drug of choice for onchocerciasisIt can be used to treat scabiesAll the above a  <response>: Ref-KDT 6e p813,814 Ivermectin is the drug of choice for onchocerciasis river blindness and strongyloidosis. It is also effective against other filarial worms It can also be used orally for the treatment of scabies and pediculosis. DEC is contraindicated in onchocerciasis 