What is the conjugate base that forms when the acid donates one proton?

CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases

Problem

What is the conjugate base that forms when the acid

H_2SO_4

donates one proton? (a)

SO_4^{2-}

(b)

H_3SO_4^{+}

(c)

HSO_4^{-}

(d)

H^{+}