**Core Concept:** Distal convoluted tubule (DCT) is a part of nephron in the kidney responsible for reabsorption of essential substances such as electrolytes, water, and glucose. The process of active transport is crucial in this process.

**Why the Correct Answer is Right:** The correct answer, **D. Glucose**, is absorbed in the DCT through a process called facilitated diffusion. Active transport is not the correct mechanism for glucose absorption here, as it is a simple diffusion process, which does not require energy input from the cell. Glucose is actively reabsorbed in the proximal tubule (PT).

**Why Each Wrong Option is Incorrect:**

A. **Sodium (Na+)**: Sodium absorption is primarily done in the distal nephron, including the DCT and collecting duct (CD), through active transport mechanisms like the sodium-potassium-adenosine triphosphatase (Na+/K+-ATPase) pump and the sodium-glucose co-transporter (SGLT).

B. **Water (H2O)**: Water reabsorption also occurs in the DCT through the action of the aquaporin channels, particularly aquaporin-1 (AQP1), which allows passive, facilitated diffusion of water. However, the wrong answer should not be specifically mentioned.

C. **Potassium (K+)**: Potassium is reabsorbed in the DCT through active transport mechanisms like the sodium-potassium-adenosine triphosphatase (Na+/K+-ATPase) pump, but the explanation should not specifically mention potassium.

**Core Concept:** The A/E (antidiuretic hormone) and ANP (Atrial Natriuretic Peptide) are hormones that regulate the reabsorption of electrolytes, particularly sodium, in the nephron, including the DCT.

**Why Each Wrong Option is Incorrect:**

A. **Antidiuretic Hormone (ADH)**: ADH is responsible for reabsorbing water (H2O) in the distal nephron, particularly in the collecting duct (CD), not the DCT.

B. **Atrial Natriuretic Peptide (ANP)**: ANP is primarily involved in regulating sodium and water reabsorption in the medulla, including the inner medulla and collecting duct (CD), not the DCT.

**Core Concept:** Distal convoluted tubule (DCT) is part of the nephron that plays a crucial role in maintaining electrolyte and water balance by reabsorbing essential substances like glucose, amino acids, and ions, including sodium, potassium, and chloride ions.

**Why Core Concept is Right:** The DCT is responsible for the reabsorption of glucose, amino acids, and ions such as sodium, potassium, and chloride ions. These substances are reabsorbed through active transport mechanisms like the sodium-glucose co-transporter (SGLT) for glucose, ion channels for ions like sodium and potassium, and carrier-mediated transport for amino acids.

**Why Each Wrong Option is Incorrect:**

A. **Glucose (