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 is true. A tall organizational structure, characterized by more levels of management and a narrower span of control, can promote effective communication in some cases. Clear lines of communication can exist between each level, aiding in the smooth flow of information.

However, the reason is not the correct explanation for the assertion. Tall structures having fewer levels of management doesn't necessarily lead to quicker decision-making. In fact, tall structures often face challenges in decision-making due to the need for information to flow through multiple layers, which can slow down the process. The assertion is about effective communication, not necessarily about the speed of decision-making.