1. If you are feeling wronged at work or you think life is not being fair to you, then you may face an increased risk of suffering a heart attack. 2. In a unique study that linked fairness with heart health, researchers from the university college London found that those who felt they were being unfairly treated by their employer, family or society were twice as likely to suffer serious heart disease as those who perceived the world as fair. 3. People in the high category were 55% more likely to have serious heart diseases as those who did not feel they were unfairly treated. Women and those with lower incomes and status significantly felt they were being unfairly treated. 4. Reacting to the study, Dr. Ashok Seth, head of cardiology at max Healthcare, said, because people are better off nowadays, earning a lot more money than what they did 15 years ago, stress of running a house has decreased significantly.
The first sentence is tricky. Although it appears to have a cause effect relationship,the subject of the sentence deals with feelings and those are always judgmental. Hence only options (a) and (d) are possible. Sentence 2 is clearly a fact. Sentence 3 is also a fact. The consequences are clearly outlined in sentence 4.Hence statement 4 is an inference.