The correct option is A inalienable
Inalienable means not subject to being taken away from or given away by the possessor. Freedom and equality cannot be taken away from any human being. Hence, Option A is correct. Among the rest of the options, inscrutable means impossible to understand or interpret, incalculable means too great to be calculated or estimated, institutional means related to an organisation or hierarchy, insufferable means unbearable. These options do not express the intended meaning, hence incorrect.