Which of the following bases has a conjugate acid with the smallest pKa? 
Definitions:
Quebec
A province in eastern Canada, known for its French heritage, language, and culture, making it a unique part of the predominantly English-speaking country.
Treaty of Cateau-Cambresis
A series of agreements signed in 1559, ending the conflict between the French Valois and Spanish Habsburgs.
Henry II
A King of England from 1154 to 1189, known for legal reforms that laid the basis for the English common law system.
Albrecht Wallenstein
A prominent military leader and mercenary during the Thirty Years' War, known for his strategy, leadership, and complex allegiances, influencing the outcome of numerous battles.
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