Which is caused by allergy ?

Assertion : The antibodies separted from serum are homogenous.

Reason : Monoclonal antibodies are homogenous immunological reagents.

Thalidomide is a non-barbiturate sedative drug which was to be given to pregnant women. Its use was withdrawn in $1961$ because it resulted in phocomelia. This condition illustrates

Rocky mountain fever is caused by

Malaria fever coincides with liberation of

The principle of sterilization is based upon experiment carried by