The correct option is A Infected needles and syringes
It is common knowledge that transmission of HIV takes place only through contact with body fluids.
The major ways of transmission are:
1. Mother to child, when the mother is HIV+ve, while she is pregnant.
2. Through sharing of needles and syringes.
3. Through sexual activities, usually when multiple sex partners are involved.
4. Through emergency blood transmission (which is rare nowadays).