Which of the following statements is correct?
A. Common cold - Droplet Infection.
B. Typhoid - Contaminated food & water.
C. AIDS - Shaking hands.
D. Ringworm - Using infected towels.
1. A and B
2. C and D
3. A and C
4. A, B and D

Sexual stage (gametocytes) of plasmodium occurs in 
1. Salivary glands of mosquito
2. Human RBC
3. Intestine of mosquito
4. Human liver

Choose the correctly matched pair from the following.
(1) Gonorrhoea, hepatitis B - Sexually transmitted diseases

(2) AIDS, gonorrhoea- viral infection 

(3) Diphtheria, ringworm - fungal infection 

(4) Diphtheria, tuberculosis - protozoan infection 

Which of the following is not a character of cancerous cells in our body ?
1. Contact inhibition 
2. Neoplasia
3. Metastasis
4. Inability for differentiation 

Which one of the following immune system components does not correctly match with its respective role?
1. Interferons - secreted by virus-infected cells and protect non-infected cells from further viral infection
2. B-lymphocytes-produces antibodies in response to pathogens into blood to fight with them
3. Macrophages-mucus secreting cells that trap microbes entering in the body
4. IgA-present in colostrum in early days of lactation and protect infant from diseases

Which of the following pathogens is not transmitted by vector?
1. Salmonella typhi 
2. Alpha virus 
3. Plasmodium 
4. Wuchereria bancrofti

Which one of the following is not derived from plants?
1. Opioids
2. DDT
3. Cocaine
4. Cannabinoids

When plants/animals are infected with virus, they may produce an anti-viral substance that is capable of inhibiting the multiplication of that virus. Identify the correct name of this substance.
1. Virion
2. Antiviron
3. Antigen
4. Interferon

Refer to the given figure depicting a diseased condition in humans and name the worm causing this disease.

1. Epidermophyton floccosum
2. Ascaris lumbricoides
3. Wuchereria bancrofti
4. Entamoeba histolytica

Refer to the given figure and choose the organism not related to the condition shown here.

1. Microsporum

2. Trichophyton

3. W. malayi

4. Epidermophyton