For limit state design of RC beam consider following:i) \(\left[ {\frac{{{f_y}}}{{{f_{ck}}}} = 0.36} \right]\)ii) \(\left[ {\frac{{{A_{st}}}}{{bd}} = 4\% } \right]\)iii) \(\left[ {\frac{{{x_{u\;max}}}}{d} = 0.48} \right]\)Which one of the design criteria shall be applicable?

• A. Balanced section
• B. Over - reinforced section
• C. Under reinforced section
• D. both balanced and over reinforced sections