Mukesh is taller than Suresh but shorter than Rakesh. Rakesh is taller than Harish but shorter than Amar. Who among them is the shortest with regards to height?

On the basis of give information,
Order of ranking of height in the question of variable nature as it cannot be established whether Harish is taller than Suresh or not. The given information not complete to bring a relationship between Harish and Suresh.
So it cannot be determined who is the shortest.