The correct option is B if both Assertion and Reason are true but Reason is not the correct explanation of Assertion
Typhoid is an acute
infectious disease caused by Salmonella typhi. Typhoid
spreads through food, milk and water contaminated with
intestinal discharges either directly or through flies and
faulty personal hygiene. Main symptoms are high fever, headache,
diarrhea, gastrointestinal disorders like ulceration
of intestine etc. Typhoid is diagnosed by Widal test, an
agglutination test-for the presence of antibodies against the
Salmonella organisms that cause typhoid fever. So, the correct answer is
'if both Assertion and Reason are true but Reason is not the correct
explanation of Assertion'.