Can a TABLE have primary key without Clustered Index? - Yes | Can a TABLE have Clustered Index without primary key? - Yes

 A primary key is a unique index that is clustered by default. By default means that when you create a primary key, if the table is not clustered yet, the primary key will be created as a clustered unique index. Unless you explicitly specify the nonclustered option.

A clustered index stores all columns at the leaf level. That means a clustered index contains all data in the table. A table without a clustered index is called a heap.