Among six persons F, G, H, I, J, and K, who is second tallest?
I. F is shorter than only two persons and I is taller than only J.
II. H is taller than only two persons, I is taller than H but shorter than G. K is the tallest.
From I, Statement I alone is not sufficient to answer the question. From II, K G I H F/J F/J G is the second tallest. Hence Statement II alone is sufficient to answer the question.