Question

Match the following disease with their test for detection:

Disease		Diagnostic tests
P.	Tuberculosis	(i)	Lepromin test
Q.	AIDS	(ii)	ELISA
R.	Syphilis	(iii)	Mantoux test
S.	Leprosy	(iv)	Kahn's test

• A. P(iv), Q(ii), R (iii), S(i)
• B. P(iii), Q(ii), R (iv), S(i)
• C. P(i), Q(ii), R (iii), S(iv)
• D. P(ii), Q(i), R (iii), S(iv)

Answer 1

The Correct Option is B

The correct option is (B): P(iii), Q(ii), R (iv), S(i) .

Answer 2

This is a matching question pairing four diseases with their standard diagnostic tests. Let's go through each pairing on its own merits.

1. P(iv), Q(ii), R(iii), S(i): This pairing puts Kahn's test against tuberculosis and Mantoux test against syphilis, which is backwards. Kahn's test is a serological test for syphilis, and the Mantoux (tuberculin) test is for tuberculosis, so this combination swaps the two.
2. P(iii), Q(ii), R(iv), S(i): Here tuberculosis pairs with the Mantoux test, AIDS pairs with ELISA, syphilis pairs with Kahn's test, and leprosy pairs with the lepromin test. Each of these is the textbook-standard test for its disease.
3. P(i), Q(ii), R(iii), S(iv): This puts the lepromin test against tuberculosis and the Mantoux test against syphilis, which mismatches both; the lepromin test is a skin test for leprosy, not tuberculosis.
4. P(ii), Q(i), R(iii), S(iv): This puts ELISA against tuberculosis and lepromin test against AIDS, which is wrong on both counts; ELISA is the standard screening test for HIV/AIDS, and lepromin test belongs to leprosy.

The Mantoux test uses purified protein derivative to detect tuberculosis exposure, ELISA detects HIV antibodies for AIDS, Kahn's test is a flocculation test for syphilis, and the lepromin test assesses the immune response in leprosy. Only the second combination lines up every disease with its correct test.

So the correct answer is P(iii), Q(ii), R(iv), S(i).