The Wheatstone bridge shown in figure here, gets balanced when the carbon resistor is used as R1 has the color code (orange, red, brown). The resistors R2 and R4 are 80Ω and 40Ω, respectively. Assuming that the color code for the carbon resistors gives their accurate values, the color code for the carbon resistor is used as R3 would be

• A. Brown, blue, black
• B. Brown, blue, brown
• C. Grey, black, brown
• D. Red, green, brown