One Word Substitutes - Verbal and Reasoning

Directions to SolveIn questions given below out of four alternatives, choose the one which can be substituted for the given word/sentence.
Q1:

That which cannot be corrected

A Unintelligible

B Indelible

C Illegible

D Incorrigible

ANS:D - Incorrigible

Incorrigible (Adjective): (of a person or their tendencies) Not able to be corrected, improved, or reformed.