π1,π2,π3 and π4 are the osmotic pressures of 5% (WV) solutions of urea, fructose, sucrose and KCl respectively at certain temperatures. The correct order of their magnitude is

Moles of urea =560; Moles of fructose =5180;Moles of sucrose =5342;  Moles of KCl (effective)=2×574.5=537.25Osmotic pressure is a colligative property ,hence it depends on number of solute particles.As the number of moles increases osmotic pressure increases.