Identify which of the following are acid-base reactions. Select all that apply.

a. NaOH(aq) + HCIO₄(aq) → NaCIO₄(aq) + H₂O(l)
b. HCOOH(aq)+NaOH(aq) → HCOONa(aq) + H₂O(l)
c. Fe³⁺ (aq) +3Ag(s) → 3Ag⁺ (aq) + Fe(s)
d. 2NaCl(aq) + Pb(NO₃)₂(aq) → PbCl₂(s) + 2NaNO₃(aq)
e. HI(aq) + CH₃NH₂(aq) → CH₃NH⁺₃(aq) + I¯(aq)