Match the pathogens with the diseases they cause:

List-$I$	List-$II$
$(a)$ Fungi	$(1)$ Club rot of crucifers
$(b)$ Bacteria	$(2)$ Late blight of potato
$(c)$ Virus	$(3)$ Black rot of crucifers

In which system does the specific $mRNA$ become silent after being complementary to a $dsRNA$ molecule?

Crystalline protein synthesized by $Bacillus$ $thuringiensis$ is activated by

Which of the following is not an advantage of $GM$ crops?

Given below are two statements:
Statement $I$: $Bt$ toxins are insect group specific and coded by a gene $cry$ $IAc$.
Statement $II$: $Bt$ toxin exists as inactive protoxin in $B. \text{ thuringiensis}$. However, after ingestion by the insect, the inactive protoxin gets converted into active form due to alkaline $pH$ of the insect gut.
In the light of the above statements, choose the correct answer from the options given below:

$Cry$ $IAb$ effectively controls