Which statement is correct for glomerular filtration rate (GFR)?

(i) The amount of the filtrate formed by the kidneys per minute is called glomerular filtration rate (GFR.)

(ii) GFR in a healthy individual is approximately 125 ml/minute, i.e., 280 litres per day.

(iii) Glomerular filtration rate regulated by juxtaglomerular apparatus (JGA).

(iv) JGA is formed by cellular modifications in the distal convoluted tubule and the afferent arteriole at the location of their contact.

(v) A fall in GFR can activate the JG cells to release renin which can stimulate the glomerular blood flow and thereby the GFR back to normal.

(vi) Renin which converts angiotensinogen in blood to angiotensin II and further to angiotensin I, which is a powerful vasoconstrictor, increases the glomerular blood pressure and thereby GFR.