During urine formation, which of the following process create thigh osmotic pressure in the uriniferous tubule?

• Active Na⁺ absorption, followed by absorption of Cl⁻

• Active Cl⁻ absorption, followed by absorption of Na⁺

• Active secretion of Na⁺ into efferent arteriole followed by absorption of Cl⁻ into the efferent renal arteriole

• Active secretion of Cl⁻ and absorption of Na⁺ into the efferent renal arteriole