The effect of the slope of peninsular plateau can be seen –

Option (c) is correct because the effect of the slope of peninsular plateau can be seen in direction of water flow. The slope of any region is usually calculated by direction of water flow. Most of the peninsular rivers flow west to east indicating its general slope.

Option (a) is not correct because structure of peninsular is roughly triangular in shape. It has been a stable shield which has gone through little structural changes since its formation.

Option (b) is not correct because peninsular plateau slope depends on direction of water flow not on the amount of water.

Option (d) is not correct because peninsular plateau is made up of sandstone, soil. Amount of soil cannot determine its slope.