In chemiosmosis in mitochondria, protons flow from the intermembrane space into the matrix, whereas in chemiosmosis in chloroplasts, protons flow from

the stroma into the cytosol.
the stroma into the thylakoid space.
the matrix into the stroma.
the thylakoid space to into the stroma.
the intermembrane space into the stroma.

Chemiosmosis refers to the process of the synthesis of the chemical called ATP by the osmosis of protons from high concentration to low concentration.

The process of chemiosmosis takes place in both the mitochondria and the chloroplast in which the enzyme ATP synthase is embedded in the inner membrane and the thylakoid membrane respectively.

In Mitochondria the proton flow from the intermembrane space to the matrix side drives the synthesis of ATP whereas in chloroplast the proton flow from the thylakoid space to the stroma drives the synthesis of ATP.

Thus, the selected option is the correct answer.