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Q.

 Read the following statements.

(a) Pneumonia is caused by a retrovirus, and it is transmitted by direct contact.

(b) The transmission of malarial parasites occurs through the bite of the female Aedes mosquito.

(c) Ascariasis is transmitted through water and food contaminated with eggs of roundworms.

(d) Houseflies act as mechanical carriers of amoebiasis.

In the above, the correct statements are 

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a

a and b 

b

b and c 

c

c and d  

d

a, c and d 

answer is C.

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Detailed Solution

Pneumonia is caused by bacteria, Haemophilus influenzae and Streptococcus pneumonia. Transmission of malaria is by female Anopheles mosquito.

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