Hint: In the given question, we have been asked that when a number is divided by 1, what quotient do we get. For knowing that, we must know what property does 1 have over all numbers.
Complete step-by-step answer:
We know that when we multiply any number with one, we get the number itself.
Let there be a number \[x\].
Let us multiply \[x\] with one, we get \[x\].
\[x \times 1 = x\]
Now, let us take 1 to the other side, where it is going to divide \[x\] and we get,
\[x \div 1 = x\]
Hence, on dividing a number by 1, we get the number itself.
Hence, the correct option is D.
Note: So, for solving questions of such type, we first write what has been given to us. Then we write down what we have to find. Then we think about the concept or formula which contains the known and the unknown and pick the one which is the most suitable and the most effective for finding the answer of the given question. Then we use the results or finding of the concept and apply it to our question. It is really important to know and follow all the results of the concepts if we have to solve the question correctly, as one slightest error gives the incorrect result.