The horse has played a little known but very important role in the field of medicine. Horses were injected with toxins of diseases until their blood built up immunities. Then a serum was made from their blood. Serums to fight with diphtheria and tetanus were developed this way. It can be inferred from the passage, that horses were
Options:
(A) given immunity to diseases
(B) generally quite immune to diseases
(C) given medicines to fight toxins
(D) given diphtheria and tetanus serums
Official Answer Key:
A
Step-by-Step Solution & Explanation
The passage states horses were injected with disease toxins until their blood built up immunities — i.e. the injections were a deliberate process to induce immunity in the horses, from which serum was then harvested. This directly supports option (A): horses were given (i.e., made to develop) immunity to diseases. Option (B) wrongly implies horses were naturally/generally immune (not stated); (C) reverses the actual process (toxins were injected, not medicines against toxins); (D) confuses the horses as the source of serum with them being recipients of the serum, which the passage does not state.
Section 1 — Engineering Mathematics
9 question(s) in this section: Q.1, Q.2, Q.11, Q.12, Q.13, Q.26, Q.27, Q.28, Q.29
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