The following question is based on an extract from a genealogy knowledge base. It contains facts of immediate family relations $($spouses$,$ parents, etc.$)$ and contains definitions of more complex relations $($ancestors$,$ relatives$).$ Which queries about relationships between people is false.

Predicates:

parent$($x$,$ y$),$ child$($x$,$ y$),$ father$($x$,$ y$),$ daughter$($x$,$ y$),$ etc.

spouse$($x$,$ y$),$ husband$($x$,$ y$),$ wife$($x$,$y$)$

ancestor$($x$,$ y$),$ descendant$($x$,$ y$)$

male$($x$),$ female$($y$)$

relative$($x$,$ y$)$

Facts:

husband$($Joe$,$ Mary$),$ son$($Fred$,$ Joe$)$

spouse$($John$,$ Nancy$),$ male$($John$),$ son$($Mark$,$ Nancy$)$

father$($Jack$,$ Nancy$),$ daughter$($Linda$,$ Jack$)$

daughter$($Liz$,$ Linda$)$

Queries

husband$($John$,$ Nancy$)$

relative $($Jack$,$ John$)$

ancestor$($Mark$,$ Jack$)$

descendant$($Liz$,$ Jack$)$

Question $10$Select one:

a$.$

descendant$($Liz$,$ Jack$)$

b$.$

relative $($Jack$,$ John$)$

c$.$

ancestor$($Mark$,$ Jack$)$

d$.$

husband$($John$,$ Nancy$)$