In which color are the railway lines shown in the topographic map ?ARedBBlackCBlueDGreenAnswer: B. BlackRead Explanation:Map ReadingInternationally accepted signs and symbols are used for making maps.Convential Colours used:a) Green-Natural Vegetationb) Yellow - Farmlandc) Red - Settlements & roads,d) Black - Railway line, latitudes and longitudes, telephone linese) Blue - Water bodies