The correct option is A 0.000001
We know that
1 second = 1000 milliseconds
1 second = 1000000000 nanoseconds
So, 1000 milliseconds = 1000000000 nanoseconds
Therefore,
1 millisecond = 1000000 nanoseconds
1 nanosecond = 11000000 milliseconds
= 0.000001 milliseconds