(c) : During glomerular filtration in kidneys, ultrafittration of blood occurs i.e., almost all the constituents of plasma except proteins pass onto the Bowman's capsule. Then nearly 99% of the filtrate is reabsorbed by renal tubules. Proximal convoluted tubules shows maximum reabsorption and nearly all the essential nutrients and 70−80% of electrolytes and water are reabsorbed by this segment.