Which of the following is true about Butane?

Butane is classified as an alkane with the molecular formula C4H10, which directly corresponds to the option that states it is the alkane for C4H10. This means it is composed of four carbon atoms and ten hydrogen atoms. Additionally, butane is indeed commonly used as a fuel source in various applications, including lighter fuel and camping stoves, making the statement regarding its use in lighter fuel accurate as well.

Choices related to other carbon counts or structural configurations do not accurately describe butane, reinforcing that both the identification of its molecular formula and its common applications in fuel confirm that the combined assertions are true. Thus, recognizing that both statements about butane's identity and its usage in lighter fuel are correct is pivotal for understanding its chemical properties and practical uses.