Which of the following is necessary for teaching mathematics?
(a) Teaching based on activities.
(b) Teaching should be done in a conceptual manner.
(c) Teachers should have to ignore the learning gaps of the students.
(d) Teachers should use different teaching methods.
(e) Students should be active.
1
(a), (b), (c) and (e)
2
(a), (b), (c) and (d)
3
(b), (c), (d) and (e)
4
(a), (b), (d) and (e)