Let's break down the assertion (A) and reason (R):
Assertion (A): "Co-operative learning activities are those in which students must work together in order to complete a task or solve a problem."
This is a correct statement because co-operative learning involves students working collaboratively towards a common goal, such as completing a task or solving a problem together. It emphasizes teamwork and interaction among students.
Reason (R): "These techniques are used to identify a weak learner and to separate him/her from the rest of the members of the group for taking special care of him/her."
This is incorrect. Co-operative learning aims to foster collaboration and inclusion, not to separate a "weak" learner from the group. In fact, co-operative learning seeks to support all learners, including weaker ones, by providing opportunities for them to engage with their peers and learn in a supportive environment. The idea of separating a learner from the group contradicts the essence of co-operative learning.
Conclusion:
The assertion (A) is correct, but the reason (R) is incorrect. Therefore, the correct answer is 3. (A) is correct but (R) is not correct.