Match List I with List II

List I		List II
A.	Common cold	I.	Plasmodium
B.	Haemozoin	II.	Typhoid
C.	Widal test	III.	Rhinoviruses
D.	Allergy	IV.	Dust mites

Choose the correct answer from the options given below :

To match List I (Disease, Symptom, or Test) with List II (Causative Agent, Substance, Diagnostic Test, or Allergen), let us analyze each item step-by-step:

A. Common cold: The common cold is a viral infectious disease of the upper respiratory tract. It is most commonly caused by Rhinoviruses. Therefore, A matches with III.

B. Haemozoin: Haemozoin is a disposal product formed from the digestion of blood by some blood-feeding parasites, notably the malaria parasite Plasmodium. When Plasmodium infects red blood cells, it breaks down hemoglobin and releases haemozoin, which is responsible for the characteristic chill and high fever recurrences. Therefore, B matches with I.

C. Widal test: The Widal test is a clinical diagnostic test used to detect enteric fever, commonly known as Typhoid fever, which is caused by the bacterium Salmonella typhi. Therefore, C matches with II.

D. Allergy: Allergies are hypersensitive responses of the immune system to certain substances in the environment. Common allergens include pollen, animal dander, and Dust mites. Therefore, D matches with IV.

Combining all these matches, we get:
A-III, B-I, C-II, D-IV