Rohan is taller than Anand but shorter than Seema.
Krishna is taller than Pushpa but shorter than Anand.
Dhiraj is taller than Krishna but shorter than Seema. Who among them is the tallest ? 

Answer: B. Seema

In terms of height, we have :
Anand < Rohan,  Rohan < Seema,  Pushpa < Krishna,  Krishna < Anand,  Krishna < Dhiraj,  Dhiraj < Seema.
So, the sequence becomes :
Pushpa < Krishna < Dhiraj < Anand < Rohan < Seema.
Clearly, Seema is the tallest.