What is the correct sequence of steps in Anuradha's lab procedure?

• aPreparation of culture medium → Placement of explant → Production of plantlets → Root formation → Transfer to natural environment
• bPreparation of culture medium → Plantlet formation → Root formation → Placement of explant → Transfer to natural environment
• cSelection of mother plant → Preparation of culture medium → Placement of explant → Plantlet formation → Transfer to natural environment
• dSelection of mother plant → Preparation of culture medium → Callus formation → Placement of explant → Transfer to natural environment