If the depth of actual neutral axis of a doubly reinforced beam
a) Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier.
b) Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier.
c) Is equal to the depth of critical neutral axis, the concrete and steel attains their maximum stresses simultaneously.
d) All option are correct. (Ans)