Consider two rectangular sheets, Sheet M and Sheet N of dimensions 6 cm × 4 cm each.Folding operation 1: The sheet is folded into half by joining the short edges of the current shape.Folding operation 2: The sheet is folded into half by joining the long edges of the current shape.Folding operation 1 is carried out on Sheet M three times.Folding operation 2 is carried out on Sheet N three times.The ratio of perimeters of the final folded shape of Sheet N to the final folded shape of Sheet M is _______.

• A. 5 : 13
• B. 7 : 5
• C. 13 : 7
• D. 3 : 2