Data Sufficiency - Verbal and Reasoning

Q1:

Question: What is the shortest distance between Devipur and Durgapur ? Statements:
  1. Durgapur is 20 kms away from Rampur.
  2. Devipur is 15 kms away from Rampur.

A I alone is sufficient while II alone is not sufficient

B II alone is sufficient while I alone is not sufficient

C Either I or II is sufficient

D Neither I nor II is sufficient

E Both I and II are sufficient

ANS:D - Neither I nor II is sufficient

Explanation: Clearly, the distance of each village from Rampur is given in I and II. But nothing about their relative positions is mentioned. So, the distance between the two villages cannot be calculated.