Find the smallest number from the given options:
Step 1: Count the number of digits in each number. 1000 and 3222 has 4 digits whereas 111 and 225 has three digits.
Step 2: The number with less number of digits < The numbers with more number of digits
So, options b and d are not the required options
Step 3: Compare 111 and 225
Compare the hundreds digits. The hundreds digit in 111 is 1.
The hundreds digit in 225 is 2.
Since 1 < 2, 111 < 225 .
So, option c is the correct answer