Data Inadequate. As No relation is given among Randhir and Nitin.
This justifies what answer for what question? Q & A: 
Sukhbir is taller than Randhir but not as tall as Ajit. If Manoj is taller than Nitin, who is shorter than Ajit, then who among them is the shortest?
Options:
(A) Nitin
(B) Sukhbir
(C) Manoj
(D) Data inadequate
(E) None of these
(D)