Question

2. Consider the following statements.
1. Stagnant water causes diseases.
II. Female Anopheles mosquitoes which cause
malaria born in stagnant water.
III. Typhoid is caused by the intake of dirty water.
Choose the incorrect statement.
(a) Only !
(b) Only II
(c) Only III
(d) All are correct​

Answer 1

Answer:

b

Explanation:

only 1 and 2 are crct ans

Answer 2

Answer :

(d) All are correct .

Explanation:

1. Stagnant water causes diseases.

( Dangers. Malaria and dengue are among the main dangers of stagnant water, which can become a breeding ground for the mosquitoes that transmit these diseases. Stagnant water can be dangerous for drinking because it provides a better incubator than running water for many kinds of bacteria and parasites ) : Correct.

2. Female Anopheles mosquitoes which cause malaria born in stagnant water.

( Aegypti genus mosquitoes breed in clean water, Anopheles and Culex genus mosquitoes breed in dirty water. However, the official said, Anopheles Stephensi which carries malaria-causing parasite in urban localities, breeds in waters stored in containers ) : Correct.

3.Typhoid is caused by the intake of dirty water.

( The typhoid bacillus is transmitted by consumption of contaminated food or water. Occasionally, direct faecal–oral transmission may occur. Shellfish taken from sewage-polluted areas are an important source of infection; transmission also occurs through eating raw fruit and vegetables fertilized by human excreta and through ingestion of contaminated milk and milk products. Flies may cause human infection through transfer of the infectious agents to foods. Pollution of water sources may produce epidemics of typhoid fever when large numbers of people use the same source of drinking-water ) : Correct.

So, the answer is (d) All are correct.

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