The standard reduction potentials at 298K for the following half reactions are given against each

Zn²⁺ (aq) + 2e ⇌ Zn(s) ; –0.762 V

Cr³⁺ (aq) + 3e ⇌ Cr (s); –0.740 V

2H⁺ (aq) + 2e ⇌ H₂(g) ; 0.00 V

Fe³⁺ (aq) + e ⇌ Feu²⁺ (aq) ; 0.770 V

Which is the strongest reducing agent?

(a) Zn (s)

(b) Cr (s)

(c) H₂(g)

(d) Fe³⁺(aq)