SSC JE Mechanical Engineering 2018 Set 4 Paper

In the question two statements are given, followed by two conclusions, I and II. You have to consider the statements to be true even if it seems to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements.
Statement I : No lemon is sour
Statement II : All sour is yellow
Conclusion I : Some yellow is lemon
Conclusion II : All lemon is yellow