What is the difference between putExtra$()$ and putExtras$()?$

a$.$ There is no difference between the two methods.

b$.$ putExtra$()$ can only be used with primitive data types, while putExtras$()$ can be used with any data type.

c$.$ putExtra $0$ is deprecated and should not be used.

d$.$ putExtran$)$ is used to add a single key$-$value pair to an intent, while putExtras$()$ is used to add a bundle of key$-$value pairs.