Which of the Following Is Untrue About Prior Inconsistent Statements

Which of the following is untrue about prior inconsistent statements?

A) If made by defendant while in custody,Miranda warnings need not be shown to have been given prior to the statement being made for it to be admissible for impeachment.
B) If statement made by defendant at trial is inconsistent with statement made at time of arrest,Miranda warnings must be shown to have been given prior to the statement being made for it to be admissible for impeachment.
C) If statement made by defendant at trial is inconsistent with a statement made at time of arrest,Miranda warnings do not have been given prior to the statement being made for it to be admissible for impeachment.
D) For a pretrial statement by defendant to be admitted at trial as a prior inconsistent statement,it need not be independently admissible as an admission by a party opponent.