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.

Correct option is B

Option (b) is the correct order of the given sentences.
Explanation of correct sequence:
· The sentence begins with "Science progresses by"
· Q. collection of observations → This directly follows the opening clause.
· P. or by experimentation → Offers an alternative method of scientific progress.
· R. whereas pseudo sciences do → Introduces a contrast.
· S. not worry about → Completes the contrast about pseudo sciences ignoring experimentation.
Final sentence:
Science progresses by collection of observations or by experimentation, whereas pseudo sciences do not worry about observation and experiments.