In the question below, a sentence is given, divided into parts which when rearranged will form a logical and coherent sentence. One of the parts does not belong to the sentence. Identify the part that does not belong to the sentence and rearrange the remaining parts to form a meaningful sentence. Choose the option that represents the correct arrangement and mark the options accordingly. 1. neuroplasticity grants the mature human brain the remarkable ability 2. in direct response to acquiring complex new skills 3. to continuously reorganize its fundamental neural pathways 4. cognitive decline is an inevitable part of the aging process 5. or recovering from severe traumatic physical injuries

(c) is the right answer as 1325 is the correct sequence and part 4 is the odd part. Part 1 introduces the core scientific concept and subject—neuroplasticity grants the mature human brain the remarkable ability. Part 3 seamlessly connects to explain what that ability is—to continuously reorganize its fundamental neural pathways. Part 2 gives the first trigger for this reorganization—in direct response to acquiring complex new skills. Part 5 provides the alternative trigger to complete the thought—or recovering from severe traumatic physical injuries. Part 4 is the odd part out because it introduces a pessimistic statement about cognitive decline and aging, which does not fit into the sentence describing the adaptive, positive mechanics of neuroplasticity.