Step 1: Start with the easiest pair:
Impacted means pressed together, so D goes with IV, the jammed ends. Options 1 and 2 have D-IV. Options 3 and 4 have D-III or D-II, so they are out.
Step 2: Use the word clue for Green-stick:
Green-stick is a bend in soft, young bone. That is statement I, so B-I. Option 1 has B-III, which is wrong. Option 2 has B-I, which fits.
Step 3: Check the remaining two:
Transverse is a straight break across, statement II. Oblique is a diagonal break, statement III. Option 2 says A-II and C-III, which agrees.
Step 4: Conclusion:
Only option 2 passes every check.
Final Answer:
Every pair in option 2 fits its meaning, so option 2 is correct.
\[\boxed{2}\]