In letterpress printing, line length and column widths are measured in terms of: (A) Inches (B) Ems (C) Centimeters (D) Characters Correct Ans: (B) Explanation:- In letterpress printing, printers measure line length and column widths using Ems. This unit, based on the width of the letter "M" in a particular typeface, ensures precision in layout and text alignment. By using Ems, printers maintain consistency and readability in printed materials.