
An increase in the number of protons,
when unaccompanied correspondingly by an increase in the number of neutrons, almost always produce an unstable isotope of an element higher on the Periodic Table.
A. when unaccompanied correspondingly by an increase in the number of neutrons, almost always produce
B. when not accompanied by a corresponding increase in the number of neutrons, almost always produce
C. when that is unaccompanied correspondingly by an increase in the number of neutrons, almost always produces
D. if not accompanied by a correspondingly increased number of neutrons, almost always produce
E. if not accompanied by a corresponding increase in the number of neutrons, almost always produces
Day 1 Question of the Verbal Contest:
Race Against the GMAT Club TimerPlease make sure to post a brief reply without revealing your solution to enter the contest!
E for me.
Subject is "An increase", singular, so the verb should be produces. A, B and D out.
In C use of "Correspondingly" is wrong, correct form is Corresponding increase in...