Which of the following is$/$are correct about graph databases?

Question $12$Select one or more:

a$.$

In Neo$4$j$,$ a node may have properties, but a relationship cannot have properties.

b$.$

In Neo$4$j$,$ a node can have zero or many labels, while a relationship can have zero or many types.

c$.$

Graph databases may have better performance than relational databases for certain kinds of queries.

d$.$

Cypher is Neo$4$j$\text{'}$s query language, which is declarative.