(a)Teaching is like selling and learning is like buying.
(b)Teaching is a social act while learning is a personal act.
(c)Teaching implies learning whereas learning does not imply teaching.
(d)Teaching is a kind of delivery of knowledge while learning is like receiving it.
(e)Teaching is an interaction and is triadic in nature whereas learning is an active engagement in a subject domain.
(a), (d) and (e)
(b), (c) and (e)
(a), (b) and (c)
(a), (b) and (d)