The correct option is A Proximal convoluted tubule
Proximal convoluted tubule is the site for the reabsorption of useful substances from the glomerular filtrate.
In this section, complete reabsorption of glucose takes place through active transport. This region also helps in absorbing amino acids and vitamin-C.
It helps in absorbing sodium, potassium, calcium from the glomerular filtrate, and water is also reabsorbed through osmosis.