Correct Answer: Both assertion and reason are true, but the reason is not the correct explanation of the assertion.

Solution : The correct answer is (b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.

The assertion states that informal organization helps in building camaraderie among employees, which is true. Informal organization refers to the relationships and interactions that occur within an organization outside of the formal, official structure. These informal interactions often lead to a sense of camaraderie and closeness among employees.

The reason provided, stating that informal organization is characterized by official communication channels and predefined roles, is not accurate. Informal organization is, by definition, the opposite of formal or official structures. It is characterized by unofficial, spontaneous interactions and relationships that form based on personal connections and common interests, not predefined roles and official communication channels.