HERPENGINA>Usually infants,sore throat and vesicle formation and ulceration starts from usually back of mouth ,painful accompanied with fever. RUBELLA>PRIMARILY Rashes will be seen on face progressing to trunk and rest of body.Fever,Joint pain etc will accompany. Scarlet fever>> Strawberry tongue,fever,VERY TYPICAL RASH etc Herpes simplex>>Too many details for HSV1 N HSV2 to be categorized with ONLY A FEW above mentioned presentations. SO MOST PROBABLE DIAGNOSIS HERPANGINA.