CTET 2 Math and Science 13 Jan 2023 Paper

The teacher conducts some activities aiming to evoke previous knowledge of students at the starting of teaching-learning process. Which of the following is NOT correct in the context of these activities?
(i) They helps in building connections of knowledge.
(ii) They are waste of time and resources.
(iii) They are not helpful in making the learning process effective.
(iv) They are positive and psychological initiative to prepare the students for learning.