(i) is higher than that at a dilute solution.

(ii) is lower than that of a dilute solution.

(iii) is same as that of a dilute solution.

(iv) cannot be compared with an osmotic pressure of a dilute solution.

Correct Answer: (i) is higher than that at a dilute solution.

Explanation: As the osmotic pressure is directly proportional to the concentration of a solution, the osmotic pressure of a concentrated solution of a substance at a given temperature is higher than that at a dilute solution.