A light house of 120 m height is just visible above the horizon from a ship. The correct distance (m) between the ship and the light house considering combined correction for curvature and refraction, is

The distance d to the horizon is given by d = sqrt(h / 0.06735), where h is the height in meters and 0.06735 is the combined correction factor for curvature and refraction. For h = 120 m, d = sqrt(120 / 0.06735) = sqrt(1781.7) = 42.21 m. The option 42226 m is likely a unit conversion error in the question source (treating 120m as 120km or similar).