Assertion : Calabar swelling is caused by eye worm
Reason : Loa loa is called the 'eye worm'

Options

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C. If the assertion is true but the reason is false
D. If both the assertion and reason are false

Answer

B

Explanation

One of the important human filaria is the African eye worm. Loa loa, transmitted by mangofly chiefly found in Africa. They commonly invade subcutaneous tissue and during their migration may pass across the eye ball hence the name eyeworm.
Loa microfilariae is very injurious and fatal when they penetrate brain and spinal cord and perhaps carry neurotropic viruses. During their migration, they cause itense itching and swelling. They also cause swelling and pair in eyes, known as ''calabar swelling''