What follows is an opinion from a United States Court of Appeals. Your task is to identify the type of district court decision or judgment appealed from (i.e., the nature of the decision below in the district court).

Opinion:
Lisondro Melindez VERDEJO, Appellant, v. J. T. WILLINGHAM, Warden, United States Penitentiary, Lewisburg, Pennsylvania.
No. 13586.
United States Court of Appeals Third Circuit.
Submitted Oct. 3, 1961.
Decided Oct. 10, 1961.
Appeal from the United States District Court for the Middle District of Pennsylvania; Frederick V. Follmer, Judge.
Lisondro Melindez Verdejo pro se.
Daniel H. Jenkins, U. S. Atty., James S. Palermo, Asst. U. S. Atty., Scranton, Pa., for appellee.
Before GOODRICH, STALEY and SMITH, Circuit Judges.
PER CURIAM.
This is an appeal from a denial by the District Court for the Middle District of Pennsylvania of the appellant’s petition for a writ of habeas corpus. He claims that he should be given credit on his sentence for time spent in serving a term in the custody of authorities of the State of New York. The trial judge referred to the governing statute, 18 U.S.C. § 3568, and cited the appropriate authorities.
The judgment of the district court will be affirmed on the authority of the memorandum filed by Follmer, J., District Court for the Middle District of Pennsylvania, 198 F.Supp. 748.

Question: What is the type of district court decision or judgment appealed from (i.e., the nature of the decision below in the district court)?

Choices:
Trial (either jury or bench trial)
Injunction or denial of injunction or stay of injunction
Summary judgment or denial of summary judgment
Guilty plea or denial of motion to withdraw plea
Dismissal (include dismissal of petition for habeas corpus)
Appeals of post judgment orders (e.g., attorneys' fees, costs, damages, JNOV - judgment nothwithstanding the verdict)
Appeal of post settlement orders
Not a final judgment: interlocutory appeal
Not a final judgment: mandamus
Other (e.g., pre-trial orders, rulings on motions, directed verdicts) or could not determine nature of final judgment
Does not fit any of the above categories, but opinion mentions a "trial judge"
Not applicable (e.g., decision below was by a federal administrative agency, tax court)

Answer: 4