Question

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Deciduous trees are planted on the southern side of any plot in warm and humid climatic zones.
Reason (R): Teak, Sisham and Sagwan trees are examples of deciduous trees that undergo major seasonal changes during different seasons. In the light of the above statements, choose the most appropriate answer from the options given below:

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

In climatic landscape design:
• Deciduous trees $\rightarrow$ Seasonal shade control
• Evergreen trees $\rightarrow$ Continuous shading and wind protection Always check whether the Reason directly explains the Assertion in assertion-reason questions.

Answer 1

The Correct Option is B

Concept: In landscape planning and climatology, the placement of trees around buildings is determined by solar orientation, shading requirements, and seasonal climatic response.
• Deciduous trees shed leaves during certain seasons.
• They provide shade during summer and allow sunlight penetration during winter after shedding leaves. This makes them suitable for climate-responsive landscape design.

Step 1: Analyze Assertion (A).
In warm and humid climatic zones, the southern side of a plot receives significant sunlight. Planting deciduous trees on the southern side helps in:
• Reducing excessive solar heat gain during summer,
• Providing shade and thermal comfort,
• Improving microclimatic conditions around buildings. Hence, Assertion (A) is correct.

Step 2: Analyze Reason (R).
Teak, Sisham, and Sagwan are indeed examples of deciduous trees. These trees undergo seasonal leaf shedding and exhibit noticeable seasonal variations. Therefore, Reason (R) is also correct.

Step 3: Check whether (R) explains (A).
Although Reason (R) correctly identifies examples of deciduous trees, it does not explain why deciduous trees are planted on the southern side of plots in warm and humid climates. The actual explanation relates to:
• Solar control,
• Seasonal shading,
• Climatic responsiveness. Thus, (R) is not the correct explanation of (A). Therefore, the correct answer is: \[ {\text{Both (A) and (R) are correct but (R) is not the correct explanation of (A)}} \]