To determine the correct contraindications for a renal biopsy, let's evaluate each of the factors mentioned in the question options:

1. Normal Size Kidney: A normal-sized kidney is not a contraindication for renal biopsy. It indicates normal anatomy, which is generally amenable to biopsy procedures.
2. Uncontrolled Hypertension: This is a contraindication for renal biopsy. High blood pressure increases the risk of bleeding, making the procedure unsafe.
3. Solitary Kidney: Having a solitary kidney is considered a contraindication because any procedure that might jeopardize the function of the remaining kidney should be avoided unless absolutely necessary.
4. Disordered Coagulation: This is another contraindication as it increases the risk of bleeding during and after the biopsy procedure.

Based on the above analysis, options 2, 3, and 4 are contraindications for renal biopsy. Thus, the correct answer is:

• 2, 3 and 4

This solution highlights the importance of considering risks such as bleeding and kidney function, especially in cases of uncontrolled hypertension, a solitary kidney, or disordered coagulation.