Question

Conversion of antigen into harmless insoluble matter by antibody is
A.Neutralization
B.opsonisation
C.Activation
D.Agglutination

Answer 1

A. neutralization

because a antigen is transformed into a harmless matter by the action of antibody

Answer 2

Answer:  

'Conversion of antigen' into 'harmless insoluble matter' by 'antibody' is D. 'Agglutination'. This reaction is termed agglutination.

Explanation:

The 'agglutinated red cells' has the ability to 'clod blood vessels' and 'stop the circulation of the blood' in the body. If the 'blood cells' clump, then the antibody bounds to the 'appropriate antigen' on the cells.  

It occurs most commonly with immunoglobulin M (IgM). It is the harmless insoluble.  

Agglutination is the process where the antigen converted into 'harmless insoluble matter' by 'antibodies'.