Which of the following pesticides is an acetylcholinesterase inhibitor?

'Sporeine' is a

Which one of the following is a genetically improved bacterium used for pollution control?

Thurioside is a proteinaceous toxin obtained from:

Identify the incorrect statement.
$(i)$ Bacillus thuringiensis are available in sachets as dried spores which are mixed with kerosene and sprayed on to vulnerable plants.
$(ii)$ $B. thuringiensis$ are used to control butterfly caterpillars,but leave other insects unharmed.
$(iii)$ The toxin of $B. thuringiensis$ is released in the blood of larvae and the larvae get killed.
$(iv)$ By the development of methods of genetic engineering,$B. thuringiensis$ toxin genes have been introduced into plants.

Assertion $(S)$: Biological control agents destroy pests.
Reason $(R)$: Crop production decreases due to the effect of pests.