The experimental arrangement correct order is :
a. Keep the steel plate on the floor at the bottom of the tube.
b) Mark the readings in cm along the tube.
c. Take a long plastic tube of length nearly 200 cm which is be into half along the length.
d. Place one end of the tube on the book and the other end on the floor.

Options

A. c, d, b, a
B. c, d, a, b
C. c, b, d, a
D. a, b, c, d

Answer

B