The correct option is
B It results in decreased efficiency of mineral usage by plants.
Genetic modification has:
(i) Made crops more tolerant to abiotic stress (cold, drought, salt, heat.)
(ii) Reduced reliance on chemical pesticides (pest-resistant crops).
(iii) Helped to reduce on post-harvest losses.
(iv) Increased efficiency of mineral usage by plants (this prevents early exhaustion of fertility of soil ).
(v) Enhanced nutritional value of food, e.g., Vitamin 'A' enriched rice.
In addition to these uses, GM has been used to create tailor-made plants to supply alternative resources to industries, in the form of starch, fuel, and pharmaceuticals.
So, the correct answer is 'It results in decreased efficiency of mineral usage by plants.'