Consider the following statements regarding proof of admissions under Section 19-20 of the Bharatiya Sakshya Adhiniyam, 2023: Statement 1: An admission made by a witness during cross-examination can always be proved against the witness, even if it relates to matters beyond the scope of the proceeding. Statement 2: Oral admissions as to the contents of a document are not relevant unless the party shows entitlement to give secondary evidence of that document's contents. Statement 3: An admission that would be relevant between third parties if the admitting person were dead remains admissible even when the admitting person is alive and present in court. Statement 4: When a party attempts to prove an admission regarding document contents, the party must first prove they cannot access the original document. Which statements are correct?