The correct option is
B R-P-Q-S
The first statement in the sequence should be the one that starts a topic. It must not be a continuation or extension of a topic.
R is first in the sequence: R is the phrase that can best begin the sentence. It says 'bringing the light'.
R is followed by P: P continues the sentence by telling us where the light was brought from. Thus, the line becomes 'bringing the light from behind a curtain'.
P is followed by Q: Q tells the purpose of the above sentence. It says that bringing the light from behind a curtain he held in such a manner.
Q is followed by S: S continues by telling us what manner it was. It says he held it in such a manner that it(light) fell slantwise on her face.
Finally, the correct sentence is 'Bringing the light from behind a curtain he held it in such a manner that it fell slantwise on her face'.
Thus, the correct sequence is R P Q S. Hence, B is the correct option.