Ralph gets the ring stuck on his finger and tells Alice that if you want to loosen something just run some warm water over it. Then he goes to the sink and turns the faucet on the right. That would be the COLD water outlet.
Ralph offers a blood transfusion, and is told by the doctor that he'll do if he is Type A. The doctor never mentioned Rh factor, nor did he say that a Type A recipient can take blood from a donor who is either Type A or Type O.