During what major stage/age does a person feel either industry or inferiority

I believe the correct answer is in the stage between the age of four and twelve.

In the one of the psychodynamic theoretic that succeeds Freud, Erik Ericson in his psychosocial development theory divides human life in eight mayor stages. In the fourth stage (between the age of four and twelve) achievement might be industry and the downside might be inferiority.

According to Erikson's stages development, the stage of industry of inferiority occurs during the childhood years, the fourth stage.

Explanation:

When children begin applying themselves to tasks, they can begin feeling the pleasure of completing tasks or they feel inferior.