Consider the following statements 1. Igneous rocks are rich in natural gas. 2. Igneous rocks are rich in metallic minerals. 3. Igneous rocks are not fossiferous. 4. Igneous rocks consist of silicate minerals. Which of the statements given above are correct?

• A.  1, 2 and 3                    
• B.  1, 2 and 4                    
• C.  2, 3 and 4                    
• D.  1, 2, 3 and 4