A very valid question!!
There are going to be time,during the personality test that you would feel that both the options are applicable to you or there can be times where you might feel that both are non-applicable. But you still will have to choose one between the both.
You will have to give one and only ONE preference.
For e.g. in crisis situation or any situation, where supposedly you are given instructions you will either take an accepting stance and follow them or you can be analytical and ask questions to get a better understanding.
You will react in either ways- you cannot give both the reactions or choose not to react.
Hope this helps.
Kindly revert back for further queries.