The correct answer is: Only assumption II is implicit.
Assumption I is not implicit because the statement does not say that B wants to publicise his products. It is possible that B wants to give an advertisement for some other reason, such as to inform people about a new product or service.
Assumption II is implicit because the statement says that A is recommending that B give his advertisement in newspaper X. This suggests that newspaper X has a wide circulation and that B is likely to reach a large number of people by advertising in that newspaper.
Here is a table that summarizes the assumptions and their validity:
| Assumption | Validity |
|—|—|
| I. B wants to publicise his products. | Not implicit |
| II. Newspaper X has a wide circulation. | Implicit |
I hope this helps!