In this task, you are given a text which is the body of a document. You are given a question and options. Pick the correct number. Don't generate anything else apart from the numbers provided in options.

Context: OPK Oboronprom (Russian: ) is a Russian aerospace holding company. The company is involved in helicopter production engine production air-defene systems complex radio-electronic systems and leasing. Russian Helicopters Oboronprom's helicopter manufacturing group is the leading Russian designer and manufacturer of rotary-wing aircraft equipment.
Question: The document can be classified to which topic?
Options: 1)WrittenWork, 2)Film, 3)Company, 4)Artist, 5)NaturalPlace
3