Angular balance equation is given by which of the following relation?

• A. θ1 × θ4 = θ2 × θ3
• B. θ1 + θ4 = θ2 + θ3
• C. θ2 + θ4 = θ1 + θ3
• D. θ2 × θ4 = θ1 × θ3