Let, D = be a directed graph or digraph,then D’ = is a subgraph i

1.	Let, D = be a directed graph or digraph,then D’ = is a subgraph if ___________
A.	A’ ⊂ A and R’ = R ∩ (A’ x A’)
B.	A’ ⊂ A and R ⊂ R’ ∩ (A’ x A’)
C.	R’ = R ∩ (A’ x A’)
D.	A’ ⊆ A and R ⊆ R’ ∩ (A’ x A’)
Answer» B. A’ ⊂ A and R ⊂ R’ ∩ (A’ x A’)

Discussion