Explanation:

India opted for federal structure of the government, after independence. This federalism has bought about political unity, emotional unity is yet to be achieved. India is a country of multidimensional culture with distinct socio-cultural personality. After 1967 we can see in most of the states different parties are coming up. In centre also there is coalition government formed. Regional parties have demanded more and more autonomy for states. Hence option 4th is correct.