Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusion(s) logically follow(s) from the statements.
Statements:
All warriors are politicians.
All leaders are knights.
Some knights are warriors.
Conclusions:
(I) Some warriors are leaders.
(II) Some politicians are knights.

​Statements:
All warriors are politicians.
All leaders are knights.
Some knights are warriors.
From the given statements Venn diagram will be: 

​Conclusions:
(I) Some warriors are leaders. Does not Follows - ​Leaders are only a subset of knights, but we are not told that the overlapping part (warriors) includes leaders.
(II) Some politicians are knights. Follows - All warriors are politicians. Some knights are warriors. So, the knights that are also warriors are automatically politicians.

So, Only conclusion (II) follows.

Thus, the correct option is: (a)