For Q.2, the line in red is preceded by saying that the Scientists believed this was the case, which implies it is not the case, right. Wouldnt that make option 3 the correct choice?
What scientists believed was that “the diversity reflected the evolutionary changes”. That is what the author feels is wrong. Not that the evolutionary changes unfolded over time; that is mentioned as a property of the evolutionary changes themselves if you read carefully.
No ideal time, depends on whether you’re going for speed or accuracy. Most serious people would aim for 6-8 min for this entire exercise (reading passage + answering 3 questions) I believe.
CAT-holics 
For Q.2, the line in red is preceded by saying that the Scientists believed this was the case, which implies it is not the case, right. Wouldnt that make option 3 the correct choice?
What scientists believed was that “the diversity reflected the evolutionary changes”. That is what the author feels is wrong. Not that the evolutionary changes unfolded over time; that is mentioned as a property of the evolutionary changes themselves if you read carefully.
regards
J
What’s the ideal time a candidate should take to solve these sorts of questions?
No ideal time, depends on whether you’re going for speed or accuracy. Most serious people would aim for 6-8 min for this entire exercise (reading passage + answering 3 questions) I believe.
regards
J