The answer is 3 because a censure motion can indeed be moved against the entire Council of Ministers.

Let`s look at each option:

Option 1 states that a censure motion can be moved against a single Minister, which is correct. A censure motion is a device available to members of parliament to criticise or protest against the policies of a particular Minister.

Option 2 says a motion of no-confidence cannot be moved against the Prime Minister alone. This is also correct; such a motion applies to the entire government, not just an individual.

Option 3, the correct answer, asserts that a censure motion cannot be moved against the entire Council of Ministers. This is incorrect because a censure motion can be brought against the entire council if there`s dissatisfaction with their performance or policies.

Option 4, stating a censure motion can be moved against a group of Ministers, is correct. It is not limited to singling out individuals, a group can also be targeted for scrutiny or criticism.