Explanation : Online teaching refers to the presentation
and learning of courses over the Internet
through the explicit use of technology and
computer networking systems. Courses can
be designed for a handful of enrolled students
or can be made open and accessible to a
wide variety of participants, such as with
a MOOC (Massive Open Online Course).
So, Assertion (A) is true. However, only the
mode of delivery of the course is different
here. There is no difference in the learning
gains made by the learner as compared to the
conventional classroom mode. So, Reason
(R) is false.