Which of these is an correct way of defining generic class?

Question

Admin · Accepted Answer

class name { /* ... */ }

Admin · Answer

class name(T1, T2, ..., Tn) { /* ... */ }

Admin · Answer

class name[T1, T2, ..., Tn] { /* ... */ }

Admin · Answer

class name{T1, T2, ..., Tn} { /* ... */ }

Q. Which of these is an correct way of defining generic class?