This question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph.

P: When the robber was near her bed, she stood up suddenly, 'brandishing the knife. 
Q: One night the robber did enter her room but Lakshmi did not make any sound.
R: She just kept a tight hold of the knife and pretended to be sound asleep.
S: The robber was taken aback and with a loud cry, he ran out. 

• SQRP

• PRQS

• QRPS

• PSQR