Yes, the answer is option B as to make plant resistant to nematodes a technique called RNA interference is used in which mRNA is silenced or can say prohibited to form it's protein via translation. So, if protein is not formed nematodes can't attack the plant
Hope it helps.

Silencing of mRNA, also known as RNA interference (RNAi), is a biological process that has been widely used in producing transgenic plants resistant to various pests and diseases. This technique involves the suppression or downregulation of specific genes by targeting and degrading their mRNA molecules.

Silencing of mRNA has been particularly effective in producing transgenic plants resistant to the following pests and diseases:

a) Bollworms: Bollworms, also known as cotton bollworms or Helicoverpa armigera, are one of the most destructive insect pests in agriculture. They cause extensive damage to crops like cotton, corn, soybeans, and other economically important plants. By silencing specific genes involved in the growth and development of bollworms, transgenic plants can be engineered to produce insecticidal proteins that are toxic to these pests. This provides a natural defense mechanism against bollworm infestations.

b) Nematodes: Nematodes are microscopic, worm-like organisms that can cause significant damage to plant roots, leading to stunted growth, reduced yields, and even plant death. By targeting and silencing specific nematode genes essential for their survival or reproduction, transgenic plants can be developed with enhanced resistance to nematode infestations.

c) White rusts: White rusts are fungal diseases caused by various species of Albugo. They primarily affect plants belonging to the Brassicaceae family, such as cabbage, cauliflower, and radish. By silencing genes involved in the pathogenicity of white rust fungi, transgenic plants can be engineered with increased resistance to these fungal infections.

d) Bacterial blights: Bacterial blights are plant diseases caused by pathogenic bacteria, such as Xanthomonas oryzae and Xanthomonas campestris. These bacteria infect a wide range of crops, including rice, tomatoes, and citrus fruits. By silencing specific bacterial genes essential for their virulence or survival, transgenic plants can be developed with enhanced resistance to bacterial blights.

In all these cases, silencing of mRNA plays a crucial role in downregulating the expression of specific genes in the pests or pathogens, thereby reducing their ability to cause damage to the transgenic plants. This approach provides a sustainable and environmentally friendly method of crop protection, reducing the reliance on chemical pesticides and promoting the cultivation of pest-resistant crops.