How low root/shoot ratio affects transpiration

Low root/shoot ratio affects transpiration increase the transpiration.

Transpiration is the process by which aerial plant components, such as stem leaves, lose water as vapour. It depends on a variety of internal and external circumstances.
- Temperature, sunlight, atmospheric pressure, humidity, and other environmental elements are examples. The rate of transpiration is influenced by internal elements such as leaf area, leaf structure, root/shoot ratio, etc.
- Water from the soil is absorbed by the roots. The vascular bundle's transport water to every component of the plant. It transpires through the shoot. Plants will be able to absorb more water if their roots have a larger surface area. But with a low root surface area and increased shoot surface area, the water transpiring from the shoot will be more than the water absorbed by the root thereby increasing the transpiration.

Hence the correct answer is option A.