Some parts of a sentence have been jumbled up, and labelled P, Q, R and S. Select the option that gives the correct sequence in which these parts can be rearranged to form a meaningful and grammatically correct sentence.

Science progresses by

P. or by experimentation,
Q. collection of observations
R. whereas pseudo sciences do
S. not worry about

observation and experiments.

A

RPQS

B

QPRS

C

QRPS

D

QSPR