The enzyme whose activity level is determined by tetrazolium test is

Answer: Option C

The enzyme whose activity level is determined by tetrazolium test is Dehydrogenase.
Tetrazolium test, commonly known as the TZ test for seed viability has, therefore, been developed to furnish quick estimates of seed's germinability.
The test indirectly measures the respiration processes that occur in the mitochondria of the cells that make up the tissues of the seeds. The reducing reaction of the solution of the tetrazolium salt under the action of dehydrogenase enzymes results in triphenylformazan, which presents a red carmine colouration. The test is very useful in processing, handling, storing and marketing.