Hint: Communalism can be termed as an attachment that is very strong to their own community. In a secular country like India, such attachment can be categorized as an unhealthy attachment. Communalism can be seen as an integral part of political philosophy. It has been used as propaganda of divide and rule.
Politics guided by ethics drawn from different religions were believed by Mahatma Gandhi. He believed that religion can never be separated from politics by that he meant that every religion has its own moral values and ethics and a sense of morality in politics can be brought by religion. When religion is used a political identity can be termed as communalism. Religion is perceived as the basis of a nation. It is expressed in politics in which one religion tries to establish domination over another here state power is used to show domination over the rest religious group. Followers of the same religion can be termed into one community with the same fundamental interest with no differences. This belief is flawed fundamentally. The demands of a particular group of religions are used in opposition to another group. This type of ideology is termed communalism.
So, the correct answer is Option D.
Note: In Communalism any religion can be considered as superior to other religions. The demands represented by a particular group of religions are used against another. There is involvement of state power in order to show domination of one religious group over the rest of the groups. This type of ideology is fundamentally flawed.