The correct answer is option no, (3) because the length of loop of Henle of juxta medullary nephron is longer than the length of loop of Henle of cortical nephron and runs deep into medulla. Option (1) is incorrect as juxta medullary nephron are not present in columns of Bertini. Option (2) is incorrect because renal corpuscle of juxta medullary nephron lies in inner cortical region. Option (4) is incorrect as juxta medullary nephrons are lesser in number than cortical nephrons.