1. Genetic defect in which adenosine deaminase  deficiency occurs :-

(1) Rhematoid arthritis

(2) SCID

(3) AIDS

(4) Cystis fibrosis

2. Common cold is caused by a :-

(1) Bacteriam 

(2) Protozoan

(3) Fungus 

(4) Virus

3. Cancer detection is based on ————-

(a) biopsy and histopathological studies of thetissues

(b) blood and bone marrow tests for increasedcell counts in the case of leukemias

(c) radiography, computed tomography andmagnetic resonance imaging

(1) a and b 

(2) b and c

(3) a and c 

(4) a, b and c

4. Differentiation of immature lymphocytes intoantigen-sensitive lymphocytes occurs in -
(1) Liver
(2) Spleen
(3) Bone marrow and Thymus
(4) Secondary lymphoid organs

5. Which of the following is an autoimmunedisorder in which auto-antibody are produced against synovial membrane?
(1) Chronic hepatitis
(2) Addison's disease
(3) Rheumatoid arthritis
(4) Myasthenia gravis