$10\, N$and $\dfrac{1}{10}N$solution is called
A.Decinormal and decanormal solution
B.Normal and decinormal solution
C.Normal and decanormal solution
D.Decanormal and decinormal solution

Hint: Generally $\text{deca-}$and $\text{deci-}$ are the prefixes of the decimal unit in the metric system which is represented as a factor of $10$. Here in this problem normality,$N$represents the strength of the solution and can also be expressed by the decimal unit in which $\text{deca-}$,$\text{deci-}$,$\text{centi-}$, etc prefixes are used according to given conditions.

Complete answer:In a metric system, each type of measurement is measured with base units and their conversions can be easily done between units by moving the decimal point left or right. A lot of prefixes are there to express the unit. Prefixes are the starting letters or words for different units.
In the metric system, we represent $\text{kilo-}$by thousands, $\text{hecto-}$ by hundreds, $\text{deca-}$by tens, $\text{deci-}$by lengths,$\text{centi-}$by hundredths, and $\text{mili-}$by thousandths. In the following table, a list of prefixes is given.



When we move to the left side each unit is ten times larger than the unit to the right. Then the prefix $\text{deca-}$represents $10$times, $\text{hecto-}$means $100$times, and $\text{kilo-}$means $1000$times the base unit.
And as we move to the right each unit is ten times smaller. The prefix $\text{deci-}$represents $\dfrac{1}{10}th$of the base unit, $\text{centi-}$represents $\dfrac{1}{100}th$of the base unit, and $\text{mili-}$represents $\dfrac{1}{1000}th$ of the base unit.
Similarly, Now the given solution has strength $10N$and $\dfrac{1}{10}N$, therefore we can express their unit by adding a prefix before the unit normal. As we know $\text{deca-}$means a factor of $10$ and $\text{deci-}$means a factor of $\dfrac{1}{10}th$, then we can represent $10N$it as decanormal and $\dfrac{1}{10}N$as decinormal.
Thus, option (D) is correct.

Note: There are a lot of benefits to learning the prefix. This is because we will be able to apply them in various measurements. It also helps us to understand the basic units of measurement. Generally, the basic unit of mass is $ki\log ram$, length, and volume has a basic unit $meter$ $litre$. For example, the length of this pen is $15$ centimeters.