1000 SC 161

[ektamatta]

Based on the growth rates of large modern reptiles such as the Galapagos tortoise and examinations of fossils of juvenile dinosaurs, scientists estimate that the largest dinosaurs probably lived to be between 100 and 200 years old.

(A) Based on the growth rates of large modern reptiles such as
(B) On the basis of growth rates of large modern reptiles such as
(C) Based on the growth rates of large modern reptiles like
(D) On the basis of growth rates of large modern reptiles, like those of
(E) Based on such growth rates as those of large modern reptiles like

[g_beatthegmat]

Seems to be (B).

Based on..., scientist... - scientist cannot be based on something.
On the basis... is correct.

Also, we would use "such as" here instead of "like" because we're giving an example, saying "for example" and not "similar to" Galapagos tortoise.

[ektamatta]

yes OA is b

Thanks