Diaphragms are contraceptive devices used by the females. Choose the correct option from the statements given below
(i) They are introduced into the uterus
(ii) They are placed to cover the cervical region
(iii) They acts as physical barriers for sperm entry
(iv) They act as spermicidal agents.
A. I and ii
B. I and iii
C. ii and iii
D. iii and iv
