In a month of 31 days, the Total seconds (in time) are 2,678,400. Its scientific notation is $2.6784\times {10}^6$ . Among the following values, which of the value is numerically equal scientific notation  

Option ( A): Compare 2.6784&26.784 decimal point is shifted one place to right. So, the number should be multiplied by 10

$2.6784\times {10}^6=2.6784\times {10}^1\times {10}^5\left(\because {10}^6={10}^1\times {10}^5\right)$

            $=26.784\times {10}^5$

Option ( C ) :Decimal point is shifted to two places to the right. The number should be multiplied by 100.

$2.6784\times {10}^6=2.6784\times {10}^2\times {10}^4\left(\because {10}^6={10}^2\times {10}^4\right)$

$=267.84\times {10}^4$

Option ( D) : Decimal point is shifted to 3 places to the right. So the number should multiplied by $\left(1000={10}^3\right)$

$\begin{array}{c}\text{2}.\text{6784}\times \text{1}{0}^6=2.6784\times {10}^3\times {10}^3\left(\because {10}^6={10}^3\times {10}^3\right)\\ =2678.4\times {10}^3\end{array}$  

Option ( B ): Decimal point is shifted without multiplied by 10.