Critical Reasoning

I did around 50 CR questions today from kalpan. Though i faired well above my expectation, i marked few (4-5) questions wrong as the OA seemed two obvious too me and for these questions, i started thinking too much rather than thinking straight. In all of these questions, i was in dilemma of choosing b/w the "obvious answer" (OA) and the answer which i eventually marked. It was so disappointing when i analyzed the results and explanation, that i was thinking above the pack... So, CR experts here, lighten me with your views and strategies to avoid such kind of mistakes..

In critical reasoning, depending on the type of question, you HAVE To pick obvious answer.
For example, Inference questions, you should eliminate any answer that is not obvious.

In general, eliminate the out of scope or irrelevant ones. If you end up with an obvious answer, so be it.

This is specially true for inference based questions. In such questions, the answer has to be based on premises given. Hence, selected the option that is supported by the premises, even if it's too obvious.

Here is a very good Flash Card from Erin:
"Inference questions are usually very basic, about one or more premises. PICK THE OBVIOUS ANSWER (even if it seems too obvious)."