Bunuel,

chetan2u,

I came across of this question in DS Challenge Set of Gmat Hacks and there the answer is E. Below is explanation.

Explanation: To find the distance of a line from B to the center of the trees

base, we would need to create some kind of figure, probably a triangle, that

included that line, and know something useful (like the angle measures) of that

triangle. Statement (1) doesnt tell us anything relevant to that distance, so

it is insufficient. Statement (2) is also irrelevant it doesnt help us find any

measures of the circle, such as the radius, that might help us. Taken together,

the statements are still not enough. We only know the length of one line, and

as we dont know the distance from C to the edge of the circle, we cant use

that length to determine the radius of the circle.