(A) Keep off → "don't walk on the grass" in sentence (III) - means to stay away from or avoid stepping on something.
(B) Pull it off → "can succeed" in sentence (IV) - means to successfully accomplish something difficult.
(C) Pulled out → "have her tooth extracted" in sentence (I) - means to remove or extract something.
(D) Blown up → "have it enlarged" in sentence (II) - in photography context, means to enlarge or make bigger.
Hence, Option 4: (A) - (III), (B) - (IV), (C) - (I), (D) - (II) → This correctly matches each phrasal verb with its synonymous expression in the sentences: "keep off" with not walking on grass, "pull it off" with succeeding, "pulled out" with tooth extraction, and "blown up" with photo enlargement → correct