Q. ATP biosynthesis takes place utilizing the H+ gradient in mitochondria and chloroplasts. Identify the correct sites of H+ gradient formation.

• (A) Across the outer membrane of mitochondria and across the inner membrane of chloroplast
• (B) Across the inner membrane of mitochondria and across the thylakoid membrane of chloroplast
• (C) Within the matrix of mitochondria and across the inner membrane of chloroplast
• (D) Within the matrix of mitochondria and within the stroma of chloroplast