Explanation:

- Option 1: Coalition

- A coalition is an alliance formed by political parties post-elections when no single party has gained enough seats to form a majority. Parties collaborate to create a stable government.

- Correct Answer

- Option 2: Appropriation

- Appropriation usually refers to the allocation of funds or resources, typically in a budgetary context. It's not related to forming political alliances.

- Option 3: Allegiance

- Allegiance denotes loyalty or commitment to a party or leader. It is more about loyalty than formal alliances in parliamentary contexts.

- Option 4: Prorogation

- Prorogation refers to the discontinuation of a session of a parliament or legislative assembly without dissolving it.