Step 1: Understand the reaction mechanism.
Cyclobutyl methylene reacts with nitrous acid to form a variety of products due to the nature of the reaction, resulting in CH2, OH, and CH3 groups as possible products.
Step 2: Conclusion.
Thus, the reaction with nitrous acid can yield all of the mentioned products.
Final Answer:
\[
\boxed{\text{All of these}}
\]