Identify the correct sequence to observe the onion roots while conducting experiment in your laboratory.
a) Observe the structure and arrangement of the cells under the microscope.
b) Take an onion root tip and place it on the slide.
c) Cover it with cover slip and allow to spread the material.
d) Put a drop of water and then a drop of glycerine on it.
A) d, c, b, a
B) a, b. c, d
C) b, d, c, a
D) d, b, c, a