Ordering of Sentences - Verbal and Reasoning

Directions to SolveIn questions below, each passage consist of six sentences. The first and sixth sentence are given in the begining. The middle four sentences in each have been removed and jumbled up. These are labelled as P, Q, R and S. Find out the proper order for the four sentences.
Q1:

S1: Hungary, with a population of about 10 million, lies between Czechoslovakia to the north and Yugoslavia to the south.
P : Here a great deal of grain is grown.
Q : In recent years, however, progress has been made also in the field of industrialisation.
R : Most of this country consists of an extremely fertile plain, through which the river Danube flows.
S : In addition to grain, the plain produces potatoes, sugar, wine and livestock.
S6: The new industries derive mainly from agricultural production.
The Proper sequence should be:

A QRSP

B RPSQ

C PRSQ

D RQSP

ANS:B - RPSQ

No answer description is available.