In given questions, three statements are given followed by four conclusions numbered I,II,III and IV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.
Statements: Some pearls stones. Some stones are diamonds. No diamond is a gem.
Conclusions: I. Some gems are pearls.
II. Some gems are diamonds.
III. No gem is a diamond.
IV. No gem is a pearl.
(a) Only I and II follows
(b)
Only III and IV follows (c) Only either I or IV and either II and or III follows
(d) Only III and either I or IV follows
(e) None of these.

Explanation

(d) Only III and either I or IV follows