Context: Few mornings ago , I saw a severe earthquake occuring in my dream ( or nightmare ) which resulted in damage to few houses . My own house was also destroyed . I live in three floor house ( ground , first and second ) . The second floor came down completely and also created holes in first floor .

Question: What if he had not had a nightmare ?
Options:
0. None of the above choices .
1. Holes would be created in the floor .
2. His own house would be destroyed .
3. There would have been no damage to other houses .
Answer: 0