Hi. I have recieved this from a native speaker in a formal communication. I belive that the " was" is in correct because it says " AND". It is a thorough history + a thorogh physical examination. I believe the verb should be " were". However, maybe because he has started the sentence with " A" he has considered " was" or it could be wrong as I stated above. What do you think? Thanks
"A thorough history and physical examination was performed "
"A thorough history and physical examination was performed "