The correct answer is: B) Lower rainfall.
The western part of Madhya Pradesh receives lower rainfall than the eastern part. This is because the western part of the state is located in the rain shadow of the Vindhya Range. The Vindhya Range is a mountain range that runs from north to south in central India. The western side of the Vindhya Range is in the rain shadow, which means that it receives less rainfall than the eastern side.
The rain shadow effect is caused by the way that air moves over mountains. As air rises over a mountain, it cools and condenses, forming clouds and rain. The air on the other side of the mountain is dry, because the moisture has already been deposited on the windward side.
The western part of Madhya Pradesh is located in the rain shadow of the Vindhya Range, so it receives less rainfall than the eastern part of the state. This is why the western part of the state is drier and more arid than the eastern part.
Option A is incorrect because the western part of Madhya Pradesh receives lower rainfall than the eastern part.
Option C is incorrect because the rainfall in the western part of Madhya Pradesh is not evenly distributed. The western part of the state is drier than the eastern part, so the rainfall is not evenly distributed.
Option D is incorrect because the western part of Madhya Pradesh does receive some rainfall. The rainfall in the western part of the state is lower than in the eastern part, but it is not negligible.