In humans ,kidneys are situated between A vertebra and close to the B inner wall of the abdominal cavity. A and B in the above mentioned statements are:

Options

A. `A - T_5 to T_12, B-ventral `
B. `A - T_12 to L_3, B- dorsal`
C. `A-T_12 to L_2, B-ventral `
D. `A-L_1 to L_5 B-dorsal `

Answer

To solve the question regarding the location of kidneys in humans, we need to identify the vertebrae between which the kidneys are situated and the inner wall of the abdominal cavity they are close to.

### Step-by-Step Solution:

1. **Understanding Kidney Location**: The kidneys are part of the human excretory system and are located in the abdominal cavity. They are not positioned randomly; rather, they have a specific anatomical location.

2. **Identifying the Vertebrae**: The kidneys are situated between two specific vertebrae. In humans, the kidneys are typically located between the last thoracic vertebra (T12) and the third lumbar vertebra (L3). Therefore, the answer for part A is T12.

3. **Identifying the Inner Wall**: The kidneys are positioned close to the inner wall of the abdominal cavity. The term that describes this wall is "dorsal," which refers to the back side of the body. Thus, for part B, the answer is "dorsal."

4. **Final Answer**: Combining both parts, we conclude that A is T12 and B is dorsal. This means the kidneys are situated between the T12 vertebra and the L3 vertebra, close to the dorsal inner wall of the abdominal cavity.

### Final Answer:
A = T12, B = Dorsal