help me understand this

Suppose 2:14 subjects are galed with a raginal s used to freet pein und 50 of them developed muses. he . C.CG significance level la test the dai if at marc than 2035 al us2 5 dava op hasco A lip=0.20 Hy:p> U.20 OB. Hop=0.20 O C. Hutp 020 Fy: 3- 0.20 O D. Hip-020 Py: p