He writes . . . . . . . . ink. A. with B. in C. for D. on

with
in
for
on

The correct answer is A. He writes with ink.

The other options are incorrect because:

  • B. in ink is not grammatically correct.
  • C. for ink is not a logical answer, as one does not write for ink.
  • D. on ink is not a logical answer, as one does not write on ink.

The word “write” means to put words down on paper or another surface using a pen, pencil, or other writing instrument. The word “ink” is a liquid or paste that is used for writing or printing. Therefore, the correct answer is A. He writes with ink.