Solution:Sentence D will be the starting line as it contains the main idea of the parajumble i.e. a difference in the water level is created in the manometer by gently applying pressure.
However, Sentence B states that this difference in the levels in the U-tube is a measure of the pressure applied by your palm. So, B will follow D. Further, Sentence C states that if you immerse the funnel into a bucket of water, you will again see the difference in the water level in the U-tube.
and sentence A states that the deeper you immerse it, the greater will be the difference in the water level. So, A will follow C. Going through the options, option c has the correct sequence.