The correct option is C 159.46
Here both the multiplicants have 1 digit each after the decimal point. So the product should have 2 digits after the decimal point.
The multiplication is shown as follows:
23.8←1 decimal place
×6.7←1 decimal place
___________
1 6 6 6
1 4 2 8
________
1 5 9.4 6 ←2 decimal places
So, 23.8×6.7=159.46
Therefore, Option a is the correct choice.