Answer:
Option 4 -
![2m\cdot 2n=4mn](https://img.qammunity.org/2020/formulas/mathematics/middle-school/6yee5diyryxvcumco1uobngug6a9pe7s2r.png)
Explanation:
Given : Expression
![2m\cdot 2n](https://img.qammunity.org/2020/formulas/mathematics/middle-school/twibcvm6mmilhb978grzd7mclt9rua79ap.png)
To find : The expression would be same as ?
Solution :
The given expression is in product form,
i.e. 2m is multiply by 2n
Multiply number by number and variable by variable,
![2* 2=4](https://img.qammunity.org/2020/formulas/mathematics/middle-school/6whc3l4v2az4axedljmc7blheaa32rzhbr.png)
![m* n=mn](https://img.qammunity.org/2020/formulas/mathematics/middle-school/xib6ayo9do7fh48p6bpztqksjwx78hsfax.png)
So,
![2m\cdot 2n=4mn](https://img.qammunity.org/2020/formulas/mathematics/middle-school/6yee5diyryxvcumco1uobngug6a9pe7s2r.png)
Therefore, option 4 is correct.