Which of the following has/ve unnecessary phrase/s?

Identify the error: "Some international students (i) use cassette recorders (ii) to make tapes of their classes (iii) so that they can replay the lectures (iv) again."

Do you read the Daily Star regularly, Hasan?

I've often advised you to _______ if you want to remain updated.

In the parade, the Boy Scouts presented the colors, the band marched, the mayor rode in a convertible, and -

Choose the correct sentence.

Identify the correct sentence.

Despite of the increase in train fare, most people still prefer to travel by train. (Identify the redundant word/idiom/phrase)