## **Core Concept**
The flow of lymph from the lower limb is influenced by various factors including gravity, capillary permeability, venous pressure, and external mechanical forces. Understanding these factors is crucial for managing conditions like lymphedema.

## **Why the Correct Answer is Right**
The correct answer, **D. ↑ed by massage of foot**, is right because massage of the foot helps in increasing the lymphatic flow from the lower limb. This is due to the mechanical effect of massage which helps in pushing the lymph forward through the lymphatic vessels, thereby aiding in the reduction of edema.

## **Why Each Wrong Option is Incorrect**
- **Option A: ↑sed with change from supine to standing position**. This option is incorrect because the lymph flow from the lower limb actually decreases in the standing position due to gravity's effect on the lymphatic vessels and valves. In the standing position, gravity can impede the flow of lymph back towards the trunk.
- **Option B: ↓sed in increased capillary permeability**. This option is incorrect because increased capillary permeability would actually increase the formation of lymph (↑ lymph formation) due to more fluid leaking out of the capillaries into the interstitial space. However, the statement seems to suggest a decrease in lymph flow, which is misleading. Increased capillary permeability increases lymph formation but doesn't directly decrease lymph flow; it might increase the load on the lymphatic system.
- **Option C: ↓sed in deep vein valve incompetence**. This option is incorrect because deep vein valve incompetence (or insufficiency) leads to increased pressure in the deep veins, which can enhance the flow of lymph as the body tries to compensate for the venous insufficiency. However, chronic venous insufficiency can lead to changes in the lymphatic system that might affect its function over time.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that manual lymphatic drainage (MLD) or massage can significantly aid in the management of lymphedema by enhancing lymphatic flow. This technique is often used in conjunction with other therapies like compression bandaging.

## **Correct Answer: D. ↑ed by massage of foot**