单项选择题

A.屈螺酮3mg和炔雌醇0.03mg*21片;屈螺酮3mg/炔雌醇0.02mg*28片
B.屈螺酮3mg和炔雌醇0.03mg*21片;屈螺酮3mg/炔雌醇0.02mg*24片+安慰剂*4片
C.屈螺酮3mg/炔雌醇0.03mg*24片;屈螺酮3mg和炔雌醇0.03mg*21片+安慰剂*7片
D.屈螺酮3mg/炔雌醇0.02mg*21片;屈螺酮3mg和炔雌醇0.03mg*24片+安慰剂*4片