Which of the following statement about cry genes is NOT correct?

The correct answer is Option (3) → cryIAb control the cotton bollworms borer

Option (1) cryIAc control the cotton bollworms — Correct statement.

Option (2) cryIIAb control the cotton bollworms — Correct statement.

Option (3) cryIAb control the cotton bollworms borer — Not correct. cryIAb controls the corn borer, not cotton bollworms; “cotton bollworms borer” mixes the two pests.

Option (4) cryIAb controls the corn borer — Correct statement.

NCERT Extract:
Biotechnological Applications in Agriculture – “… Specific Bt toxin genes were isolated from Bacillus thuringiensis and incorporated into the several crop plants such as cotton (Figure 10.1). The choice of genes depends upon the crop and the targeted pest, as most Bt toxins are insect-group specific. The toxin is coded by a gene cryIAc named cry. There are a number of them, for example, the proteins encoded by the genes cryIAc and cryIIAb control the cotton bollworms, that of cryIAb controls corn borer.”