Bell the CAT

From a few question papers of model CAT i found out that those questions that involve multiple answers, for ex: if line A and D are correct. The option reads

1)c-d
2)a-b
3)a-d
4)b-d

So if you find one of the lines is correct(say A) and the unable to find the other, you still wont be able to find the correct answer(confusing between b,d).

Reverse tracking this you can guess the answer by finding the most repeating options, in this case A and D. I tried this on around 30 similar questions. Without reading the question i just guessed the answer from the options and I got 22 correct. Given a penalty of 25% for every wrong answer, i still get 67%.
This works good on match the following type of questions too. A new trick on the verbal ability.
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