The period in which humans are able to reproduce is marked by the development of <span>secondary sex characteristics. The correct option among all the options that are given in the question is the first option or option "A". I hope that this is the answer that has actually come to your great help.</span>
The correct answer is 500mg.
First convert the ratio strength to a percentage(0.2%).
Drug X accounts for 0.0396 g of NaCl.
It would require 0.54 g of NaCl if that was all we were using.
Lastly, 0.54 g - 0.0396 = ~ 0.5 g NaCl ( or 500 mg, rounded as per the instructions ).
Following your instincts is not what a critical think should do.