Which of the following freedoms is not available to an Indian citizen?

(a) Freedom to criticize the government.

(b) Freedom to participate in armed revolution.

(c) Freedom to start a movement to change the government.

(d) Freedom to oppose the central values of the Constitution.

Out of the above statements, the freedom that is not available to an Indian citizen is the freedom to participate in armed revolution. The Indian Constitution allows the citizens to protest any injustice but at the same time, an armed retaliation is unlawful and thus not allowed under the constitution. The central values of the constitution are considered the basis of the Indian democracy and thus if one opposes the central values of the constitution then it can be considered as a revolution against the state.

Hence, option (b) and (d) are correct.