Which one of the following series of dilutions is required to obtain a 4 nM solution from a 4 M stock solution? 1 in 100

[answerhappygod]

Which one of the following series of dilutions is required to
obtain a 4 nM solution from a 4 M stock solution?
1 in 1000 of 4 M to give x, followed by 1 in 1000 of x to give 4
nM
1 in 1000 of 4 M to give 4 nM
1 in 1000 of 4 M to give x, followed by 1 in 1000 of x to give
y, followed by 1 in 1000 of y to give 4 nM
1 in 100 of 4 M to give x, followed by 1 in 1000 of x to give 4
nM
1 in 1000 of 4 M to give x, followed by 1 in 100 of x to give y,
followed by 1 in 10 of y to give 4 nM
1 in 100 of 4 M to give x, followed by 1 in 100 of x to give y,
followed by 1 in 100 of y to give 4 nM