The correct option is A 4
?×6=24
It means there are 24 blocks in an array.
If it has 6 columns, how many row will it have?
1×6=6
2×6=6+6=12
3×6=6+6+6=18
4×6=6+6+6+6=24
So, there are 4 rows and 6 columns.\begin{tabular}{|l|l|l|l|l|l|}
\hline & & & & & \\
\hline & & & & & \\
\hline & & & & & \\
\hline & & & & & \\
\hline
\end{tabular}
Therefore, 4×6=24.