Question

Assertion :Escherichia coli, Shigella sp. and Salmonella sp. are all responsible for diarrhoeal diseases. Reason: Dehydration is common in all types of diarrhoeal diseases and adequate supply of fluids and electrolytes should be ensured.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
• C. Assertion is correct but Reason is incorrect.
• D. Both Assertion and Reason are incorrect.

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

Diarrhoeal diseases conditions showing frequent and excessive discharge of watery material from the bowel. Diarrhoeal diseases mostly result from ingestion of harmful germs with food and water. E. coli, Shigella sp. and Salmonella sp. causes diarrhoea. It is due to intake of contaminated water. Diarrhoea caused by virus, bacteria or parasites possesses two characteristics- firstly, the offending organisms colonise the intestine and as a consequence cause inflammation of the intestine or enteritis and secondly, they upset the balance of intestinal fluid absorption and secretion mechanism, often enhancing the later very considerably, which is then manifested as watery stool discharged frequently in large volumes.

Therefore, the correct answer is option B.