The answer is: C
Explanation
The most accurate application of the principle in this case is:
C: A will succeed as the school's policy discriminates on the basis of the gender of the parent and incorrectly holds that a mother cannot be a guardian of her child.
Explanation:
The principle clearly states that the State is prohibited from discriminating against any citizen on the grounds of sex. In this case, the school's policy, which denies admission to a child because the mother is the applicant and does not recognize her as the natural guardian, discriminates on the basis of the gender of the parent (mother). This policy is in violation of the principle of non-discrimination on the grounds of sex.
Additionally, the principle also mentions that equal treatment of persons not similarly placed may result in greater discrimination and inequality. In this case, the school's policy is treating mothers differently from fathers when it comes to guardianship rights, which is discriminatory. Therefore, A will succeed in her claim that the school's policy is discriminatory towards women and wrongly denies mothers their guardianship rights to their own children during the lifetime of the father.