When I answered the question, I *knew* I was taking a gamble on the intended interpretation.

What convinced me to pick the "wrong" answer was the wording: "can have primary keys and indexes defined" - I interpreted this as meaning that you could define any index you want, in addition to those implied by primary key and unique constraints.

For table variables, the truth is that the statement is neither true nor false.

"can have primary keys and indexes defined" - true, because you can define indexes by declaring a primary key constraints and unique constraints in the table declaration.

"can have primary keys and indexes defined" - false, because you can define the primary key any way you want (within the standard rules for primary keys), but you can not define indexes any way you want; you cannot defined non-unique indexes, cannot define unique indexes on columns taht you don't want to declare a unique constraint on, cannot include additional columns in a nonclustered index, etc.

Both explanations are valid, so I was looking for an answer option "true for temp tables; depends for table variables".