TS EAMCET Medical 8 May 2019 Shift 2 Paper

Assertion (A): Bt toxin exists as inactive prototoxin but once an insect ingests the inactive toxin, it is converted into an active form of toxin.
Reason (R): Protoxin gets activated in insect gut due to the acidic pH in the gut. which solubilises the protein crystals.
The correct answer is: