You might have observed from previous experiences that many questions in single choice question papers follow some sort of a pattern that unintentionally help make the correct options predictable or at least help with cutting down on the incorrect ones.
Some of the commonly known ones are:
- Same option number shouldn’t be selected for multiple consecutive questions
- Options like ‘All of these’ and ‘None of these’ are mostly incorrect (though ‘All of these’ is relatively more used)
- The lengthier and more comprehensive option is usually the correct
- If all other options are proven incorrect then the leftover one has to be correct
- If the same option is shared between multiple questions, all of them shouldn’t be correct simultaneously
Are there any other patterns you observed?
On 2.: my anecdotal experience has honestly shown almost the opposite. Personally in the exams I’ve taken, those responses tend to be correct at least more often than not.
Other than that, the patterns seem to mostly be correct from my experience. Nothing much more to add.
To be fair, I haven’t taken an exam (other than work training modules) for over a decade, so my experience may not be up-to-date.