Option 3: (C), (B), (D), (A) -> This correctly arranges the sequence from ex-ante (planned) to ex-post (actual) investment. The process flows as: (C) Producer plans to add Rs 100 to inventory (ex-ante/planned investment) → (B) Unforeseen surge in demand occurs (unexpected event) → (D) Producer sells Rs 30 from stock to meet extra demand (unplanned disinvestment) → (A) Final inventory increases by only Rs 70 (ex-post/actual investment = Rs 100 planned - Rs 30 unplanned sale = Rs 70 actual). This demonstrates the difference between planned and realized investment due to unforeseen market conditions. -> correct