select the correct option: a. Glomerulus is a a tuft of capillaries formed by the afferent articles which is a fine branch of renal vein b. Giomerulus along with the bowman's capsule forms renal corpuscle c. Vasa recta is a find branch of afferent arteriole which runs parallel to Henie's loop d. in human kidney, cortical nephron and juxtamedullary nephrons are in equal proportion

Options

A. a and b are correct
B. b and c are correct
C. a, b and d are correct
D. a and d are correct

Answer

To solve the question, we need to analyze each of the provided statements one by one to determine which ones are correct.

### Step-by-Step Solution:

1. **Statement A**: "Glomerulus is a tuft of capillaries formed by the afferent arterioles which is a fine branch of the renal vein."
- **Analysis**: The glomerulus is indeed a tuft of capillaries, but it is formed by the afferent arterioles, not a branch of the renal vein. The afferent arterioles branch from the renal artery, not the renal vein. Therefore, this statement is **incorrect**.

2. **Statement B**: "Glomerulus along with the Bowman's capsule forms the renal corpuscle."
- **Analysis**: This statement is true. The glomerulus and Bowman's capsule together make up the renal corpuscle, which is the initial filtering component of the nephron. Therefore, this statement is **correct**.

3. **Statement C**: "Vasa recta is a fine branch of the afferent arteriole which runs parallel to Henle's loop."
- **Analysis**: The vasa recta are indeed the capillary networks that run parallel to the loops of Henle and are involved in the counter-current exchange mechanism. However, it is important to note that the vasa recta are not a branch of the afferent arterioles; they arise from the efferent arterioles of juxtamedullary nephrons. Despite this, the part about running parallel to Henle's loop is correct. Therefore, this statement is **partially correct** but misleading as it implies a direct relationship with the afferent arterioles.

4. **Statement D**: "In the human kidney, cortical nephrons and juxtamedullary nephrons are in equal proportion."
- **Analysis**: This statement is false. In the human kidney, approximately 85% of the nephrons are cortical nephrons, while only about 15% are juxtamedullary nephrons. Therefore, this statement is **incorrect**.

### Conclusion:
Based on the analysis:
- **Correct Statements**: B (correct), C (partially correct but misleading)
- **Incorrect Statements**: A, D

The correct option based on the statements is **B**.