Find the incorrect statement.

The correct option is B Calcitonin is a medically useful recombinant product in the treatment of infertility.

Calcitonin is a naturally occurring hormone, secreted by parafollicular cells of the thyroid, that regulates calcium levels in body and regulates bone building.

Gene therapy is the process of introduction of DNA into living human beings in order to treat disease. It is used to replace a missing gene product or to correct mutant alleles.

Bacillus thuringiensis (Bt) is a Gram-positive bacterium that produces protoxins crystals during sporulation which are potent and highly specific insecticides. These crystals are activated, by alkaline conditions of the gut of their host, into biodegradable Bt toxin and cause cell death of host through osmotic lysis.

Trichoderma harzianum is a biofungicide and is used for suppression of various disease causing fungal pathogens.

Totipotency is the ability of plant cells to regenerate into embryo under favourable conditions.

So, the correct answer is 'Calcitonin is a medically useful recombinant product in the treatment of infertility'.