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Dryopithecus was the common ancestor of
a. Man and Ape-man
b. Ramapithecus and Proconsul
c. Australopithecus and Homo habilis
d. Man and apes

Answer
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Hint: Dryopithecus is the representative of an extinct genus of apes. The lineage of Dryopithecus includes so many things such as humans and apes, this was found in a fossil in the country of Africa, it is usually called by the number of names based on the fragmentary material found in different countries.

Complete answer:
- There are several distinct forms of Dryopithecus, those include small, medium, and large-sized gorillas.
- Dryopithecus mostly has generalized structures rather than specialized features.
- Because of this generalized structure, they cannot be distinguished between the general humans and general apes.
- Some differences, where we found them are teeth, especially canines which are large and more strongly developed in the Dryopithecus than humans.
- When coming to the limbs, they are a little shorter and other features such as skull and head bones and bone ridges are not that much distinctly developed than the modern apes.
- Whereas Dryopithecus is the distinct forerunner of the chimpanzees and gorillas.
- Some of the Dryopithecus come under the genus Ramapithecus
- The common countries where we found the genus Dryopithecus are Europe, China, Africa, India.
- The genus Dryopithecus is commonly referred to as wood oak apes.
- This genus is habituated in such a way that they mainly eat plants and are considered herbivores.

Hence, The correct answer is option (A).

Note: There are so many stages in the evolution of humans, such as Dryopithecus, Ramapithecus and so many genera are found and most of them are extinct forms, and this evolution mainly depends on so many factors such as recombination, natural selection, mutations, etc.