<prompt> Erythema infectiosum is seen in -RubellaFifth diseaseScarlet feverDiphtheria  <response>: Ans. is b Fifth disease Erythema infectiosum also known as fifth disease is caused by Parvo Virus B-19.About Erythema infectiosum Most common clinical manifestation of human parvovirus infection.Characteristics skin lesions appear in 3 stages:1st phase - Cheeks are erythematous giving appearance of slapped cheeks.2nd phase - Itching erythematous maculopapular rash on extensor surface Palms and soles spread.3rd phase - Rash begins to fade and disappears in about 2 weeks. 