In which one of the following options the two examples are correctly matched with their particular type of immunity? 

	Examples	Type of immunity
(a)	Polymorphonuclear leukocytes and monocytes	Cellular barriers
(b)	Anti-tetanus and anti-snake bite injection	Active immunity
(c)	Saliva in mouth and tears in eyes	Physical barriers
(d)	Mucus coating of the epithelium lining the urinogenital tract and HCl in the stomach	Physiological barriers

1. (a)
2. (b)
3. (c)
4. (d)

A certain patient, X, is suspected to be suffering from acquired immune deficiency syndrome. Which diagnostic technique will you recommend for its detection?

Widal test is used for the diagnosis of:

1. malaria

2. pneumonia

3. tuberculosis

4. typhoid

Which type of molecule is produced by viral-infected cells to communicate to non-infected cells in the presence of a virus?

1. Complement

2. Interferon

3. Interleukin

4. Pyrogen

Match the disease in column-I with the appropriate items (pathogen/prevention/treatment) in column-II.

Cornea transplant in humans is almost never rejected. This is because:

1. its cells are least penetrable by bacteria

2. it has no blood supply

3. it is composed of enucleated cells

4. it is a non-living layer

Lysozyme that is present in perspiration, saliva, and tears destroys:

HIV that causes AIDS first starts destroying:

1. B-lymphocytes

2. leucocytes

3. thrombocytes

4. helper T-lymphocytes

In mammals, histamine is secreted by:

1. fibroblasts

2. histocytes

3. lymphocytes

4. mast cells

Active immunity means:

1. resistance developed after disease

2. increasing quantity of blood

3. resistance developed before disease

4. increasing rate of heart-beat