A rectangular beam of width 300mm and overall depth 450mm is provided with 20mm dia. Fe 415 bars on the tension side with a clear cover of 25mm. The beam is made with concrete having a Tc,max = 3.1 MPa. For the reinforcement provided and the grade of concrete used, it may be assumed that the t= 0.80 MPa. The design shear in beam B1 is 350 KN and in beam B2 is 450 KN. Considering the provisions of IS: 456-2000, which of the following is true? a) Shear reinforcement should be designed for 250 kN for beam B1 and the section for beam B2 should be revised. b) Nominal shear reinforcement is required for beam B1 and the shear reinforcement should be designed for 350 kN for beam B2. c) Shear reinforcement should be designed for 250 kN for beam B1 and the shear reinforcement should be designed for 350 kN for beam B2. d) The sections for both beam B1 and B2 should be revised.