Given below are two statements, one is labelled as Assertion(A) and other is labelled as Reason (R).

Assertion (A): Toxic insecticidal protein of Bacillus thuringiensis kills insects but does not kill itself.

Reason (R): Bt  toxin protein exist as inactive protoxin inside the bacteria but gets converted to active form in insect gut and cause lysis of insect midgut epithelial cells.

In the light of above statements, choose the correct answer from the options given below: