Amoebiasis is caused by a :

1. Bacteria
2. Protozoan
3. Virus
4. Metazoan

Which of following transmits the pathogens of sleeping sickness?

1. Housefly
2. Butterfly
3. Dragonfly
4. Tsetsefly

Which of the following statements about HIV is correct?

1. HIV primarily attacks red blood cells, leading to anemia.
2. HIV weakens the immune system, which can lead to cancer.
3. HIV is caused by a bacterium and can be treated with antibiotics.
4. HIV infection is detectable immediately after exposure.

Assertion (A): When the disease is widely distributed worldwide, it is termed as a sporadic disease.

Reason (R): Sporadic diseases are not localised, their individual cases are scattered; for example malaria, cholera, etc.

1. A is True and R is False.
2. A is False and R is True.
3. Both A and R are True.
4. Both A and R are False.