OPTIONS:Until: As a subordinating conjunction to connect an action or an event to a point in time.Example: No one left the room until the TALK ended.The preceding action is after the conjunction until.Because: Because introduces clauses of cause and reason.It is a subordinating conjunction.This means that the clause it introduces is a subordinate clause, which needs a main clause to make it complete.Example: Everyone left early because MARK and Helen had an argument.Although: Although means ‘in spite of something’. It is a subordinating conjunction.Example: Everyone enjoyed the trip to the final although we lost the match!If: Used to give a conditionExample: I'll only stay if you offer me more money.In the given SENTENCE, the subject got an 'A' GRADE in spite of being ill.The proper sentence would be 'He got an A in spite of being ill.' Therefore, the correct sentence is "He got an 'A' although he was ill."