Explanation:
Plant breeding is a method of altering the genetic pattern of plants to increase their value and utility for human welfare. It is a purposeful manipulation of plants to create desired plant types that are better suited for cultivation, give better yield and are disease resistant.Pusa Komal is a variety that is resistant to bacterial blight. It is a bushy plant variety and yields light green pods. It can flower in 45 days.Smooth leaved and nectar-less cotton varieties do not attract bollworms.A semi-dwarf variety of wheat was developed by Norman E. Borlaug at the International Centre of Wheat and Maize Improvement in Mexico. It was called Sonora by CIMMYT.Therefore, plant breeding is the fastest method to obtained improved varieties statement is incorrect.Hence, the correct option is (D).