If a child is born within ____________ days after the dissolution of a valid marriage, it is a conclusive proof of the legitimacy of the child.

Under Section 112 of the Evidence Act, if a child is born within 280 days after the dissolution of a valid marriage, it is CONCLUSIVE proof of the child's legitimacy. Section 112 creates a strong presumption - conclusive evidence means it cannot be rebutted even by proving no access between the parents. The 280-day period (approximately 9 months and 10 days) covers the full normal gestation period plus a buffer, ensuring that children born shortly after marriage dissolution are protected by this conclusive presumption of legitimacy.