Step 1: Understanding the Concept
In the sawhorse formula the C-C bond is drawn as a long slanting line, with the three bonds on each carbon drawn at its ends.
Step 2: Compare with Others
Fischer projection uses crossed lines, Newman projection uses circle and a point for the two carbons, and the wedge formula uses solid and dashed wedges.
Step 3: Compare the options
The answer is the sawhorse formula, option (B).
Final Answer:
The sawhorse formula uses a long slanting line for the C-C bond.
\[ \boxed{\text{(B) }\text{Sawhorse formula}} \]