- Judicial review is the power of the courts to examine the actions of the legislative and executive branches of government and determine whether these actions are consistent with the constitution. Actions judged inconsistent are declared unconstitutional and, therefore, null and void. - Option A describes the advisory jurisdiction of the Supreme Court (under Article 143 of the Indian Constitution), where the President may seek the Court's opinion on questions of law or fact. This is distinct from judicial review. - Option B accurately describes the core function of judicial review: the power to declare laws unconstitutional if they violate the Constitution. - Option C is related to the judiciary's administrative functions and oversight of its own structure and functioning, not the power of judicial review over other branches. - Option D describes the function of the legislature (preparing laws) and the judiciary's role in upholding the rule of law through interpretation and enforcement, but not the specific power of judicial review.