Consider the following Prolog code.

p$([],\_).$

p$([$X$|$T$],[$X$|$T$2])$ :$-$ p$($T$,$T$2).$

What does this predicate do$?$ Can any parameter be unbound during a query?

Checks if the first parameter is a prefix of the second. Any parameter can be unbound.

Checks if the first parameter is a prefix of the second. Only the first parameter can be unbound.

Checks if the first parameter is a sublist of the second parameter. Any parameter can be unbound.

Checks if the first parameter is a sublist of the second parameter. Only the first parameter can be unbound.