45. How many of the following about the virus(es) is/are correct? I. Papillomavirus － cause warts and cervical cancer; belong to dsDNA virus. II. Poxvirus － cause cowpox; belong to dsDNA virus. III. Picornavirus － cause hepatitis A; belong to ssRNA virus serves as mRNA. IV. Coronavirus － cause SARA; belong to ssRNA virus serves as mRNA. V. Paramyxovirus － cause measles and mumps; belong to ssRNA virus serves as template for mRNA synthesis. (A) 1 (B) 2 (C) 3 (D) 4 (E) 5