Which acid and base will combine to form a salt without forming water? hydrochloric acid (hcl) and ammonia (nh3) carbonic acid (h2co3) and potassium hydroxide (koh) hydrobromic acid (hbr) and calcium hydroxide (ca(oh)2) nitric acid (hno3) and sodium hydroxide (naoh)?

The acid  and base that  will combine  with   to form salt without forming  water  is      hydrochloric acid  (HCl)  and  ammonia (NH3)

      Explanation
   Hydrochloric acid (HCl)    an acid   react with ammonia (NH3)   a  base  to  form   a  salt   that is ammonium  chloride   NH4Cl   without forming   water(H20)

equation  for   reaction

 Nh3 + HCl →  NH4Cl  (salt)

The answer to your q it is d