Which word is incorrectly spelt?

1.The doctor suggested that his patient who is suffering from dengue ¾ this medicine.

2.¾ the year 2009 and 2014, I was a student of the University of Chittagong.

3.Global warming ¾ by emissions of greenhouse gas.

4.Rana gave up ¾ football when he became injured.

5.The candles have been blown ¾ by the wind.

6.If I hadn't studied hard, I ¾ the admission test.

7.Dhaka has become one of the ¾ cities in Asia.

8.The candidate was ¾ nervous to speak.

9.It was evident that damage was very serious. The bold word can be replaced by:

10.In response to your advertisement ¾ in The Daily Star, I would like to apply for one of the positions.

11.The director said that he ¾

12.I need some books, ¾?