CAT 2024 Question Paper | VARC Slot 3

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Question 18 : >Five jumbled up sentences (labelled 1, 2, 3, 4 and 5), related to a topic, are given below. Four of them can be put together to form a coherent paragraph. Identify the odd sentence and key in the number of that sentence as your answer.

1. To create a synapse, the neuron has specialized structures, often seen as tiny swellings, at its terminal end of the axon where it stores the chemicals that are emitted to transmit a signal to the next neuron.
2. This fetal warm-up act—the soldering of neural connections before the eyes actually function—is crucial to the performance of the visual system.
3. The reasons for this paring back of synapses is a mystery, but synaptic pruning is thought to sharpen and reinforce the "correct" synapses, while removing the weak and unnecessary ones.
4. Neural connections between the eyes and the brain are formed long before birth, establishing the wiring and the circuitry that allow a child to begin visualizing the world the minute she emerges from the womb.
5. During this rehearsal period, synapses—points of chemical connection—between nerve cells are generated in great excess, only to be pruned back during later development.

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Explanatory Answer

All sentences except 1 relate to the soldering of neural connections before birth in the fetus. 1, which is about how a neuron creates a synapse, is the odd one out.
Ordering the sentences, we see that 4 is the best opening sentence. 4 says neural connections between the eyes and the brain are formed long before birth. 5 adds to 4, stating that a great excess of neural connections are established in this "rehearsal period" and pruned back during later development. 3 continues the idea in 5, stating that the reason for this paring back of synapses is a mystery. 2 concludes the paragraph observing that this fetal "warm-up act" is crucial to the performance of the visual system. 4532 makes a cogent paragraph; 1 is the odd one out.

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The answer is '1'

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