The three stages of incomplete metamorphosis are Egg, Nymph, and Adult stage respectively.

The correct option is A True
Incomplete Metamorphosis has three stages: Egg, Nymph, and Adult. Insects that go through three stages of change in their life cycle have an incomplete metamorphosis.
Example: Grasshoppers, Bugs, Crickets etc.
The first stage of incomplete metamorphosis is the egg. During this time, the insect will hatch into a form called a nymph.
The nymph is basically a small version of the adult insect. Once a nymph outgrows its exoskeleton it will go through a process called moulting, in which it leaves the old “skin” or exoskeleton behind and this process takes place a number of times, until the insect becomes the size of an adult. The insect is then said to be in the adult stage.