Study the following statements.
1. Petroleum is a major source of aliphatic hydrocarbons.
2. Coal is a source of aromatic hydrocarbons.
3. Petroleum is commonly called liquid gold.
Which of the statements given above are correct?

A. 1 and 2

B. 1 and 3

C. 2 and 3

D. 1, 2 and 3

Answer: Option D