XVI. Don Ricardo had 2 legitimate children - Tomas and Tristan. Tristan has 3 children. Meanwhile, Tomas had a relationship with Nancy, who was also single and had the legal capacity to marry. Nancy became pregnant and gave birth to Tomas, Jr. After the birth of Tomas, Jr., his father, Tomas, died. Later, Don Ricardo died without a will and Tristan opposed the motion of Tomas, Jr. to be declared an heir of the deceased since he is an illegitimate child. Tomas, Jr. countered that Article 992 of the Civil Code is unconstitutional for violation of the equal protection of the laws. He explained that an illegitimate child of an illegitimate parent is allowed to inherit under Articles 902, 982 and 990 of the Civil Code while he - an illegitimate child of a legitimate father - cannot. Civil Law commentator Arturo Tolentino opined that Article 992 created an absurdity and committed an injustice because while the illegitimate descendant of an illegitimate child can represent, the illegitimate descendant of a legitimate child cannot. Decide the case and explain. (5%)