Solution
✅ Correct Option: 1
The passage says that sedentary lifestyles, obesity, lack of exercise, improper posture, excessive gym training and long hours of sitting have increased knee-injury risk. This supports the inference that modern occupational and behavioural habits can make joints more vulnerable. Option 1 is right because it draws a cautious conclusion directly from the lifestyle factors given in the passage. Option 2 is wrong because the passage says scans and early diagnosis can help prevent long-term damage; it never says diagnosis alone can eliminate mobility disorders. Option 3 is wrong because age-related wear and tear is presented as only one possible cause, not the sole cause. Option 4 is wrong because the passage explicitly says these problems “are no longer limited to athletes or elderly individuals”.