A:
Removing Hijab (veil) is prohibited and so is
coeducation. Parents are not to be obeyed in defiance to Allah (Exalted be He). You will not be committing a sin if you contradict them on this point. (Part No. 17; Page No. 263) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.