Polymerases are also available from other Thermus species. Which of the following is correct?

A. Thermus flavus gives Tfl enzyme

B. Thermus thermopilus gives Tfl enzyme

C. They are having proof reading activity

D. Thermus flavus gives Tth enzyme

Explanation: Other Thermus species also provide polymerases. Thermus flavus gives Tfl enzyme and Thermus thermopilus gives Tth enzyme. They are also 3’-5’ proof-reading activity.