Which of the following statements are true. Do not show your explanations. (d) Two graphs are isomorphic to each other if and only if they have the same adjacency matrix. (e) If T is a tree with e...

Which of the following statements are true. Do not show your explanations.

(d) Two graphs are isomorphic to each other if and only if they have the same adjacency matrix.
(e) If T is a tree with e edges and n vertices, then e + 1 = n.
 (f) Petersen graph is not Hamiltonian graph.