To avoid trasmission of STIs we should
(i) Avoid sex with multiple partners
(ii) Always have unprotected sex
(iii) Use condoms during coitus
(iv) Avoid sex with unknown partners
(v) Avoid sharing of needles
A. (i),(ii),(iii),(iv) and (v)
B. (i),(iii),(iv) and (v)
C. (i),(ii) and (iii)
D. (i),(ii) and (iv)