A work sheet contains _number of columns.
A256
B236
C652
D526
A256
B236
C652
D526
Related Questions:
Which of the following is not the use of bleaching powder?
(i) to make drinking water free from germs
(ii) in soda-acid fire extinguishers
(iii) as an oxidising agent in many chemical industries
(iv) for baking cakes