The reciprocating mass is balanced when primary force is1. balanced by the mass = cmrω2 cos θ 2. unbalanced by the mass = cmrω2 cos θ3. balanced by the mass = (1 - c) mrω2 cos θ4. unbalanced by the mass = (1 - c) mrω2 cos θSelect the correct answer using the code given below.

• A. 1 and 3
• B. 2 and 3
• C. 1 and 4
• D. 2 and 4