The correct option is D Free nuclear endosperm
The coconut water from tender coconut represents free nuclear endosperm and the kernel surrounding it is the cellular endosperm. The endosperm is a tissue that is present inside a seed and surrounds the embryo to provide nutrients, starch to the growing plants. It also contains the proteins and other oils that are essential for development.
The endosperm is initially in its nuclear phase suspended within the coconut water. As development continues, cellular layers of endosperm deposit along the walls of the coconut, becoming the edible coconut "flesh".