Assertion: `SO_(2)` gas is easily liquefied while `H_(2)` is not.
Reason: `SO_(2)` has low critical temperature while`H_(2)` has high critical temperature.
A. If both (`A`) and (`R`) are correct and (`R`) is the correct explanation of (`A`).
B. If both (`A`) and (`R`) are correct, but (`R`) is not the correct explanation of (`A`).
C. If (`A`) is correct, but (`R`) is incorrect.
D. If (`A`) is incorrect, but (`R`) is correct.