Which of the following statements are correct? a. So as to prevent oxygenated blood from mixing with deoxygenated blood birds and mammals have four chambered hearts.b. Amphibians and some reptiles tolerate some mixing of oxygenated and deoxygenated blood and therefore have three chambered hearts.c. Fishes have only two chambered hearts as here blood is pumped to gills to get oxygenated which then passes to the rest of the body.

• A. a and b
• B. b and c
• C. a and c
• D. a, b and c