steel and concrete are same

steel is lower than that for concrete

steel is higher than that for concrete

none of the above

(i) and (iii)

(i)and(iv)

(ii) and (iii)

(ii) and (iv)

wholly parabolic

wholly rectangular

parabolic above neutral axis and rectangular below neutral axis

rectangular above neutral axis and parabolic below neutral axis

is maximum at neutral axis

decreases below the neutral axis and increases above the neutral axis

increases below the neutral axis and decreases above the neutral axis

remains same

increasing the depth of beam

using thinner bars but more in number

using thicker bars but less in number

providing vertical stirrups