Among five boys, Vineet is taller than Manick, but not as tall as Ravi. Jacob is taller than Dilip but shorter than Manick. Who is the tallest in their group ?

Answer: A. Ravi
In terms of height , we have : Manick < Vineet, Vineet < Ravi, Dilip < Jacob, Jacob < Manick. So, the sequence becomes : Dillip < Jacob < Manick < Vineet < Ravi. Clearly, Ravi is the tallest.