In statement and conclusion questions you get a short statement and two or more conclusions. A conclusion follows only if it must be true whenever the statement is true. Anything that is merely likely, or that needs information the statement does not give, does not follow.
Treat the statement as true even if it sounds wrong, and do not use outside knowledge. A conclusion may say the same thing in different words; that still follows. A conclusion that adds a new idea, such as a cause, a prediction or a comparison the statement never made, does not.
With two conclusions, each either follows or does not, so there are 2 × 2 = 4 basic outcomes.
Many papers add 'either I or II follows', giving 5 answer choices in all.
Worked example 1: a restatement
'All the students of Class X passed the exam this year.' I. No student of Class X failed this year. II. The exam was easy.
I is the same fact in other words, so it follows. II offers a reason the statement never gives. Only I follows.