The single most important laboratory test for determining the virulence of staphylococci

A. Muscular dystrophy B. Myasthenia gravis C. Myelosis D. Myopathy

A. Variola virus B. Varicella zoster C. Rota virus D. Tanapox

A. Salpingectomy B. Oophorectomy C. Vasectomy D. Colostomy

A. No. of females/1000 males B. No. of males/1000 females C. No. of female births in 1000 births D. No. of male births per 1000 births