Q. Such fish that are found in rivers in Australia and Africa where water is too foul to support life with the usual gills are 1.dipnoins 2.lung fishes 3.sturgeons 4.guppies

• A. 2, 3, 4
• B. 1, 2
• C. 3, 4
• D. 1, 2, 4

Correct Answer: B