Logical Inference English

Question

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

• A. given immunity to diseases
• B. generally quite immune to diseases
• C. given medicines to fight toxins
• D. given diphtheria and tetanus serums

Comments

https://gateoverflow.in/312132/gate2011-ag-ga-10

Answer 1

B is the only one which can be logically derived. Otherwise there is no sense to use horse for making vaccines.

Comments

I got the same, Unfortunately GATE 2011 Official ANswer key contains A !

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I wish GATE people scrap this aptitude part - they can put the questions they want in set theory, probability etc and English anyway they make it hard in questions itself :P

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If they had immunity , why feed it to horses ? Feed it to humans :D

B is correct, because for making serums, one has to give disease & if that animal lives through diseases then serum can be created. For that horse/animal must have immunity in first place !