The arrangement of atoms at the peak of the activation energy barrier is known as the
a. activation rate
c. transition state
d. both b and c

The arrangement of atoms at the peak of the activation energy barrier is known as the transition state. The correct option among all the options that are given in the question is option "C". I think you forgot to give the second option in the question. I hope that this is the answer that has come to your help.

Ithink the answer is fusion