In the given question, there is a passage followed by

Solution

Option a) is correct as it can be inferred from the following excerpt of the passage: "Losing as little as 10 pounds can have a real impact on stroke risk. Exercise contributes to losing weight and lowering blood pressure, but it also stands on its own as an independent stroke risk reducer." Option b) is incorrect because death due to stroke is common among the old but it is not always necessary that death will follow a stroke. Option c) is incorrect because the passage clearly states the opposite. Option d) is incorrect because high blood sugar causes blood clots as per the passage. Therefore, the correct answer is option a).