The rectangular beam of width, 300 mm is having overall depth of 600 mm. The concrete grade is M20 and the grade of reinforcing steel is Fe415. The tensile reinforcement is provided by 5-20 mm dia bars. The clear cover is 25 mm. The design shear strength of concrete, tc, MPa for M20 grade of concrete is given as (100 Ast/bd, TC, MPa) (0.25,0.36), (0.50, 0.48), (0.75, 0.56), (1.00, 0.62), (1.25, 0.67), (1.50, 0.72), (1.75, 0.75), (2.00, 0.79), (2.25, 0.81), (2.50, 0.82) As per limit state, the critical shear capacity of beam is equal to : (a) 76.582 kN (b) 102.109 kN (c) 127.636 kN (d) 153.164 kN