Constitutional government means

This UPSC question lists as options both 'a representative government of a nation with federal structure' and 'a government limited by the terms of the Constitution', implying 'constitutional government' is contrasted with those meanings.

A student could use this contrast to test which option fits standard usage by checking other sources/examples where 'constitutional government' is equated with limitation by law rather than necessarily federal/representative form.

Defines key features of a federal government (written constitution, division of powers) showing 'federal' is a distinct technical category.

Use this rule to judge that 'federal structure' is a separate property from being 'constitutional' and so cannot be assumed to be implied by 'constitutional government'.

States a federal government has a written constitution that cannot be unilaterally altered, linking 'federal' to constitutional entrenchment but not equating 'constitutional government' with 'federal'.

A student could compare examples of constitutional governments that are unitary (UK/France) to test whether 'constitutional' always implies federal structure.

Explains classification into federal and unitary constitutions and gives country examples, reinforcing that 'constitutional' systems vary (federal vs unitary).

A student can map the examples (e.g., UK is constitutional but unitary) to infer that 'constitutional government' does not necessarily mean 'federal'.

Says 'our Constitution provides for a federal Government', indicating that 'constitution' can provide for federalism but that 'constitutional' describes the source/instrument rather than guaranteeing any specific form (representative/federal).

A student could contrast constitutions that create different forms (federal/unitary, representative/monarchical) to judge whether 'constitutional government' implies the particular combination in the statement.