Step 1: Analyze Statement 1 and Conclusion I
Statement 1 says Mathematics is essential for all subjects, meaning every subject requires mathematics.
Conclusion I says Mathematics is not needed in Sociology, which contradicts Statement 1.
Since the conclusion contradicts the true statement, conclusion I does not follow.
Step 2: Analyze Statement 2 and Conclusion II
Statement 2 says Statistics is applied in Economics, meaning economics uses statistics.
Conclusion II says Economics is applied in Statistics, which reverses the relationship and is not implied by the statement.
So, conclusion II does not follow either.
Step 3: Final decision
Neither conclusion I nor conclusion II logically follows from the given statements.