In Greek mythology, Orthrus (Greek: , "Orthros") or Orthus (Greek: , "Orthos") was, according to the mythographer Apollodorus, a two-headed dog who guarded Geryon's cattle and was killed by Heracles. He was the offspring of the monsters Echidna and Typhon, and the brother of Cerberus, who was also a multi-headed guard dog.

Based on that paragraph can we conclude that this sentence is true?
Orthrus had two heads.

Select from the following. 1. Yes. 2. It's impossible to say. 3. No.
1.