**Explanation:**

The correct answer is option **A) Secondary wall**.

The plasma membrane is the outermost layer of a plant cell, separating the cell's internal environment from the external environment. It is a selectively permeable barrier that controls the movement of molecules in and out of the cell.

The secondary wall is located just inside the plasma membrane and is present in some plant cells. It is formed after the primary wall and provides additional support and strength to the cell. The secondary wall is composed of cellulose, hemicellulose, and lignin, which make it thicker and more rigid than the primary wall. It is responsible for the rigidity of plant cells and gives support to the plant tissues.

The other options, namely **b) Tonoplast, c) Middle lamella, and d) Primary wall**, are not located nearest to the plasma membrane.

- **b) Tonoplast** is the membrane surrounding the vacuole in plant cells. It is located inside the cell and is responsible for maintaining the osmotic balance and storing various substances within the vacuole. It is not present near the plasma membrane.

- **c) Middle lamella** is a layer of pectin and other polysaccharides that is located between adjacent plant cells. It acts as a glue, holding the cells together. It is present between the primary walls of adjacent cells and is not directly associated with the plasma membrane.

- **d) Primary wall** is the first layer that is formed during cell growth and development. It is located just inside the plasma membrane and provides initial support and protection to the cell. However, it is not the layer nearest to the plasma membrane.

In conclusion, the secondary wall is the layer nearest to the plasma membrane in plant cells and provides additional support and strength to the cell.

Somewhere tonoplast is said to be it's correct ans so i m confused now which one is correct..??