A and B Are Married

A and B are married. They have an adopted child C. A died leaving as heirs, B and C and X. the father of A. State the effect of the presence of C as far as the right of X to the estate of A is concerned.

A) X shall inherit as A left no legitimate child.
B) X is excluded by the presence of C because an adopted child inherits like a legitimate child. (Art. 979(2) , NCC)
C) X and C can inherit together but C will inherit like an illegitimate chil
D) (Art. 343, NCC) - It has been deleted by the Family Code.)