total characters =200 each character having one space
total time to print 200 chars=200x6 =1200 ms
total time to space in =200x2=400 ms
200 charactes total print time =1600 ms =1.6 sec
The printing speed of the dot matrix printer in characters per second
=200/1.6 =125 character per sec
line will take 1.6 sec
Hence all options are incorrect. Marks to All given in exam.