var_qstn_ivuinstr
From ID Code.
For each person (including the household head) ask about the ID Code of the biological father and mother of the person. It might sometimes be the case that the household head's father lives in the household (e.g., a middle-aged adult who is the primary income earner lives with his old father). Do not simply assume that the household head and his/her spouse are the parents of all young children in the roster - it might be the case that the household has foster children, children from other marriages, etc. If the father and/or mother is deceased, write 99. If the father and/or mother is not resident in the household, write 88.