Transmission of HIV infection occurs by:
(A) By transfusion of contaminated blood
(B) By sharing infected needles
(C) Sexual contact with HIV infected person
(D) From an infected mother to her child through the placenta
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A), (B), (C) and (D)
HIV (Human Immunodeficiency Virus) causes AIDS. It passes from person to person through body fluids such as blood and semen. It does not spread by mere touch or physical contact.
(A) By transfusion of contaminated blood — Correct. Infected blood and blood products carry the virus.
(B) By sharing infected needles — Correct. This is common among intravenous drug abusers.
(C) Sexual contact with HIV infected person — Correct. Unprotected sex with an infected person is a major route.
(D) From an infected mother to her child through the placenta — Correct. The virus can cross the placenta to the foetus.
NCERT Extract:
AIDS – “… AIDS is caused by the Human Immuno deficiency Virus (HIV), a member of a group of viruses called retrovirus, which have an envelope enclosing the RNA genome (Figure 7.6). Transmission of HIV-infection generally occurs by (a) sexual contact with infected person, (b) by transfusion of contaminated blood and blood products, (c) by sharing infected needles as in the case of intravenous drug abusers and (d) from infected mother to her child through placenta.”