SC's Question number - 733 , 734

733). The distribution of mass within the core of the Earth, like the mantle that surrounds the core, has been deduced from the orbital behavior of the Earth and the motions of satellites controlled by the gravity of the Earth.

(A) the mantle that surrounds the core

(B) that within the mantle surrounding the core

(C) that of the mantle surrounding the core

(D) the mantle the core surrounds

(E) the distribution of mass within the mantle that surrounds the core

734). The domesticated camel, which some scholars date around the twelfth century B.C., was the key to the development of the spice trade in the ancient world.

(A) The domesticated camel, which some scholars date

(B) The domesticated camel, which some scholars having thought to occur

(C) Domesticating the camel, dated by some scholars at

(D) The domestication of the camel, thought by some scholars to have occurred

(E) The camel’s domestication, dated by some scholars to have been

Answers:

733). OA - B - right comparison - comparing the distribution of mass within the core and that within the mantle surrounding the core

A - incorrect - wrongly compares the distribution of mass within the core of the earth to the mantle

C - incorrect - wrongly compares distribution of mass within the core of the Earth to the distribution of the mantle

D - incorrect - wrongly compares distribution of mass to the mantle

E - incorrect - wordy

734). OA - D

A, B - incorrect - illogically suggest that camel instead of process of domesticating the camel was the key

C - incorrect - modifier error

E - incorrect - wrong structure. Correct structure: noun+be verb+noun/adjective
Beautiful explanation by Erin here