The compiler determines the parameterized type in a function template

a. polymorphically

b. explicitly

c. duplicitly

 All of the given options are incorrect, as the parameterized type in the function template are determined by the implicitly way by compiler.

In the function template, the parameter type is basically determined by the polymorphic process as the polymorphic behavior are mainly determine by the programmer but the parameterized type in the given function template are mainly determine by the compiler not by the type of the name in the function template.

Therefore, implicitly way for determining the parameterized type in the given function template.