Three students write numbers as described below.
Student 1: (Greatest 4-digit number +1) -(Greatest 3-digit number + 1).
Student 2: (Smallest 5-digit number - Smallest 4-digit number)
Student 3: (Greatest 4-digit number - Greatest 3-digit number) Based on the information, which statement is correct? (a) All three students have written the same number.
(b) All three students have written three different numbers.
(c) Student 1 and Student 2 have written the same number.
(d) Student 1 and Student 3 have written the same number.​