Right choice is (b) B has A as a part of itself
The explanation: Holonymy (in Greek holon = whole and onoma = name) is a semantic relation. Holonymy defines the relationship between a term denoting the whole and a term denoting a part of, or a member of, the whole. That is,
‘X’ is a holonym of ‘Y’ if Ys are parts of Xs, or
‘X’ is a holonym of ‘Y’ if Ys are members of Xs.