The lower Gangetic plain, also known as the Eastern Coastal Plain, has a hot and humid climate with high temperatures throughout the year. This region is suitable for the cultivation of crops that can withstand the high humidity and heavy rainfall.
Out of the given options, paddy and jute are the most suitable crops for this region. Paddy, also known as rice, is a staple crop in this region and requires a lot of water for cultivation. The humid climate and abundant rainfall in this region are ideal for the growth of paddy. Jute is another crop that is well-suited for the lower Gangetic plain as it requires high humidity for its growth. Jute is also known as the "golden fibre" and is used for making ropes, bags, and other textile products.
Wheat and cotton are not as suitable for this region as they require a cooler and drier climate for their growth. Wheat is a winter crop and is grown in the northern parts of India, while cotton is mainly grown in the drier regions of central and western India.