Merge Two text files line by line using batch script

Question

I have 2 text files; A.txt and B.txt and I want to merge them to make C.txt using a batch script.

However (here\'s the tricky part) I wish to do it so each line from

Answer 1

@echo off
for /f "delims=" %%a in (a.txt) do (
    for /f "delims=" %%b in (b.txt) do (
        >>c.txt echo %%a %%b
    )
)