If T is a list, then [H | T] is list, is the correct option for the given question.
Pairs. Terms having the primary functor (-)/2 are called pairs. For instance, the pair of elements A and B are indicated by the expression -(A, B). (-)/2 is referred to as an infix operator in Prolog. As a result, the phrase can also be written as A-B.
In Prolog, the fundamental data structure is called term and it has the form name (arguments...). If there are no arguments, then we talk about an atom. Number is a specific kind of atom, and body is the final component of a Prolog rule. The neck sign, represented by the letters:, separates it from the head. It takes the form of a list of objectives, separated by commas, each of which is a name part of a functor, possibly followed by a possible list of arguments, separated by commas and enclosed in parenthesis.
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