_ The resultant of the following three couples 20 kg force, 0.5 m arm, +ve sense 30 kg force, 1 m arm, -ve sense 40 kg force, 0.25 m arm, +ve sense having arm of 0.5 m will be$?

• A. 20 kg, -ve sense
• B. 20 kg, + ve sense
• C. 10 kg, + ve sense
• D. 10 kg, -ve sense