SELECT ONE/MORE :

Here are TRUE statements on adjacency list and adjacency matrix:

a. Python implementation of an adjacency matrix require complex codes

b. Adjacency list may require as much space as the adjacency matrix

c. Adjacency list is more preferable when dealing with a large sparse matrix

d. Adjacency list is more efficient than adjacency matrix

e. A lookup operation in an adjacency list is always as slow as or slower than a lookup operation in an adjacency matrix