Compare the knowledge of persons X, Y, Z, A, B and C in relation to each other :
1. X knows more than A.
2. Y knows as much as B.
3. Z knows less than C.
4. A knows more than Y.
The best knowledgeable person amongst all is :
Answer: A. X
Clearly, we have : A < X, Y = B, Z < C, Z< B, Y< A.
Thus, the sequence becomes :
X > A > Y = B > C > Z.
So, X is the best knowledgeable person.