foreign so it is a arsenic containing I say Nick containing antimicrobial drug and the microbial drug which was first used first used to cure syphilis so let's move to our options option one says type 5 so it was not used for typhoid option 2 says dysentery so it was not used for decently option 3 says syphilis so it is a correct option treatment option forces meningitis so it is also a wrong option so the correct option for this question would be option number three which says syphilis so this was the whole explanation thank you super