30.5 mL of a weak base are titrated with 24.3 mL of a strong 1.5 M acid solution. What is the concentration of the weak base before any acid was added?

Ithinks its false. tell me if im wrong

The answer is d.potassium

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts