The correct answer is: Only I and III are implicit.
The statement “Work hard to be successful in the examinations.” is an advice given by A to B. This advice implies that B wants to be successful in the examinations. It also implies that hard work leads to success. However, it does not imply that B will listen to A’s advice.
Assumption I: B listens to A’s advice.
This assumption is not implicit in the statement. The statement only says that A advises B to work hard. It does not say that B will listen to A’s advice.
Assumption II: Passing the examination is desirable.
This assumption is implicit in the statement. The statement says that B wants to be successful in the examinations. This implies that passing the examinations is desirable for B.
Assumption III: Hard practice leads to success.
This assumption is implicit in the statement. The statement says that B should work hard to be successful in the examinations. This implies that hard work leads to success.
Therefore, the correct answer is: Only I and III are implicit.