Antitoxins: a. contain modified bacterial exotoxin molecules. b. are always genetically engineered. c. contain select antigenic components of a pathogen rather than whole cells or viruses. d. confer passive immunity. e. utilize dna strands that will produce the antigen.

The correct option is d. confer passive immunity.

Explanation:

An antitoxin is an antibody formed in an organism in response to the presence of a bacterial toxin inside, which it can neutralize. We speak of passive immunity, when it is obtained by the passage of antibodies (antitoxins) to the individual in a natural or artificial way, having as main feature that it is short-lived, since they remains only until the transferred antibodies or lymphocytes disappear.

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