Explanation:

- The sentence describes Shilpa's situation with two toddlers and no help, implying that her house is difficult to maintain in good order.

- "Put her house in apple-pie order" is an idiom meaning to have things neatly and perfectly organized.

- Option 3: Completely arranged

- This is the correct meaning of the idiom. It refers to having everything tidy and well-organized.

- Option 1: Completely messy

- This is the opposite of the idiom's meaning. It suggests disorder, which doesn't fit.

- Option 2: Smell-proof

- This is unrelated; the idiom has nothing to do with odors.

- Option 4: Ready for guests

- This implies preparation but not necessarily complete order.