In the case of a snakebite,what is injected into the patient?

Which type of antibody is transferred from the mother to the fetus through the placenta?

Given below are two statements.
Statement $I$: Passive immunity is acquired when readymade antibodies are received by body cells.
Statement $II$: Resistance induced by $BCG$ vaccine is an example of passive immunity.
In the light of the above two statements,choose the correct answer from the options given below.

Which of the following types of immunity is present at the time of birth and is a non-specific type of defense in the human body?

Assertion: Interferons are a type of antibodies produced by body cells infected by bacteria.
Reason: Interferons stimulate inflammation at the site of injury.

Which of the following statements is incorrect?