As per the Vidhan Sabha Elections 2013 in Delhi, there are 70 assembly segments. An assembly segment refers to a specific geographical area or constituency within a state where elections are held to elect a representative for the state legislature. In the context of Delhi, these assembly segments represent the different areas and neighborhoods within the city. Each assembly segment has its own elected representative who represents the interests and concerns of that specific area in the legislative assembly. Therefore, option 1, 70, is the correct answer in this case.