Generally speaking, You may read the question paper very quickly with so much excitement. This quick-reading leads to the omission of a few words in the question. Those omitted words will entirely change the meaning of the question. Hence the chosen answer may not be correct. So read the question thoroughly without missing anything. Only then choose the answer.
If the question comprises words that are confusing, you should mark answers carefully. For example, you may think that the following words convey the same meaning but they actually convey an altogether different message.
The provisions according to Constitution and any other laws are different. If the question clearly mentions “According to the constitution”, then all other provisions other than constitutional should be ignored even if they are correct. The same holds true for all other such confusing words and phrases.