Which of the following is the medium of transportation of nutrients within unicellular organisms?

The medium of transportation of nutrients within unicellular organisms is protoplasm. Protoplasm is the living substance that forms the contents of a cell, composed of a mixture of organic and inorganic compounds, including water, enzymes, and nutrients. Within unicellular organisms, nutrients are transported through the protoplasm, which carries out all of the cell's metabolic functions. Blood, serum, plasma, and lymph are components of multicellular organisms and are not relevant to the transportation of nutrients within unicellular organisms.