From 'All cats are animals' and 'Some animals are pets', we can only conclude that it's possible some cats are pets, but not definite.

Since no flower is a fruit, and all fruits are sweet, flowers cannot be sweet through this relation.

By transitive property: All doctors are professionals, and all professionals are educated, therefore all doctors are educated.

Some books are novels, and all novels are stories, therefore some books must be stories by logical deduction.

Since no vegetarian is a meat-eater and all carnivores are meat-eaters, it follows that no vegetarian is a carnivore.

From the given statements, we cannot establish a definite relationship between cricketers and disciplined individuals. The second statement only tells us some athletes are disciplined, but doesn't specify if those athletes include cricketers.

Since all honest people are politicians and no politician is corrupt, it follows that all honest people are not corrupt.

All painters are artists. No artist is a businessman. By logical chain, no painter can be a businessman.

Only some leaders are visionary, not all. Therefore, we cannot conclude all leaders are forward-thinking.

All humans are mammals and all mammals breathe through lungs. Therefore, all humans breathe through lungs. Option D is definitely false.