Which of the following stage is the Critical stage for water requirement in Groundnut?

The critical stage is the growth stage of the plant which is most sensitive to water requirements. 
Groundnut: botanical name: Arachis hypogaea
Family: Fabaceae

🔴Additional Information:
Wheat: CRI, Tillering, Milking, Dough, Flowering
Rice: Booting, Panicle Initiation, Flowering
Cotton: Flowering, Boll Formation
Groundnut: Pegging, Flowering, Pod Filling