Five sentences related to a topic are given below. Four of them can be put together to form a meaningful and coherent short paragraph. ldentify the odd one out. Choose its number as your answer and key the number in:
- Our smartphones can now track our diets, our biological cycles, even our digestive systems and sleep-patterns
- Researchers have even coined a new term, "orthosomnia", to describe the insomnia brought on by paying too much attention to smartphones and sleep-tracking apps
- Sleep, nature's soft nurse, is a blissful, untroubled state all too easily disturbed by earthly worries or a guilty conscience
- The existence of a market for such apps is unsurprising: shift work, a long-hours culture and blue light from screens have conspired to rob many of us of sufficient rest