Step 1: Understanding the question.
The question asks to identify the incorrect pairing between the type of magazine and its publishing duration. Each magazine type is based on how frequently it is issued.
Step 2: Analyzing each pair.
(i) Weekly — Seven days: Correct. A weekly magazine is published once every week, that is, every seven days.
(ii) Bimonthly — Fifteen days: Incorrect. The term “bimonthly” means once every two months, not every fifteen days. A publication issued every fifteen days is called a “fortnightly.”
(iii) Monthly — One month: Correct. A monthly magazine is issued once every month.
(iv) Quarterly — Two months: Incorrect as written, because a quarterly publication is issued once every three months. However, since only one wrong pair is asked, (ii) is more clearly incorrect.
Step 3: Conclusion.
The wrong pair is (ii) Bimonthly — Fifteen days, because a bimonthly magazine is published once every two months, not every fifteen days.