The correct answer is: Only assumption II is implicit.
The statement is an advertisement for a mosquito coil called X. The advertisement claims that X is safe and effective, and that it will help people get a good night’s sleep.
Assumption I is that X mosquito coil is better than any other mosquito coil. This assumption is not implicit in the statement. The statement only claims that X is safe and effective, not that it is better than any other mosquito coil.
Assumption II is that a good night’s sleep is desirable. This assumption is implicit in the statement. The statement claims that X will help people get a good night’s sleep, which implies that a good night’s sleep is desirable.
Therefore, the correct answer is: Only assumption II is implicit.