Arrange the steps involved in the maintenance of embryonic stem (ES) cell culture in the correct sequence:
A. Prepare feeder plates two days in advance
B. Passaging is done at 1:4 ratio
C. Undifferentiated ES cells require 37° C, 5% CO2, RH 85-100% since they can differentiate spontaneously
D. Trypsinisation or mechanical cutting is done
E. Start feeding 48 hrs after thawing/passaging, every day
Choose the correct answer from the options given below: