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.

Q: Context: Beijing mostly referred to as BJ is a diesel-hydraulic locomotive used in the People's Republic of China. It is named after the capital city of China Beijing.BJ were made in two different versions a standard version and a kou'an (port) version.
Question: The document can be classified to which topic? 
Options: 1)OfficeHolder, 2)Film, 3)MeanOfTransportation, 4)Village, 5)Building

A: 3
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Q: Context: Rusk is a brand of hair care products and devices designed for hair salons. It was founded by Irvine and Rita Rusk.It is now part of Conair Corporation.
Question: The document can be classified to which topic? 
Options: 1)EducationalInstitution, 2)OfficeHolder, 3)Village, 4)Company, 5)MeanOfTransportation

A: 4
****
Q: Context: Tegeticula elatella is a moth of the Prodoxidae family. It is found in western Texas from the Big Bend region through southern New Mexico to south-eastern Arizona and the Verde Valley of central Arizona. The habitat consists of grassland and shrub desert.The wingspan is 21-28 mm. The forewings are white and the hindwings are white with an area of light to medium grey near the apex.The larvae feed on Yucca verdiensis. They feed on developing seeds. Pupation takes place in a cocoon in the soil.
Question: The document can be classified to which topic? 
Options: 1)Athlete, 2)WrittenWork, 3)Artist, 4)Animal, 5)EducationalInstitution

A:
4
****