Step 1: Concept
Neopentane is the common name for 2,2-dimethylpropane.
Step 2: Meaning
It consists of a quaternary carbon atom bonded to four methyl groups.
Step 3: Analysis
The structure shows a central point with four branches, representing four carbon-carbon bonds originating from a single central carbon.
Step 4: Conclusion
The "+" shaped or "cross" bond line formula corresponds to neopentane.
Final Answer: (C)