The correct option is
A 5
We have to divide 165 into 5, 4, or 2 equal parts.
Let us take first option, 5.
Divisibility rule of 5 is:
If the digit at ones place is 0 or 5, then the number is divisible by 5.
Hence, 165 can be divided into 5 equal parts.
Now, let's take second option, 4.
Divisibility rule of 4 is:
If the last two digits of a number is divisible by 4, then the number is also divisible by 4.
Hence, 165 cannot be divided into 4 equal parts.
Now, let's take third option, 2.
Divisibility rule of 2 is:
If the digit at the ones place is even, then the number is divisible by 2.
∴ 165 can't be divided equally into 2 parts.
So, from the given option, we can divide 165 into 5 equal parts.