How many developmental instars do the larvae (caterpillars) of *Attacus atlas* go through before pupating?

Answer

Five instars

The caterpillar stage of the Atlas moth develops through five distinct growth stages, known as instars, before entering the pupal stage inside a cocoon.

How many developmental instars do the larvae (caterpillars) of *Attacus atlas* go through before pupating?
animalinsectclassificationmothAtlas