Correct option is A
Typing is not required for all posts under SSC CGL. It is only necessary for a few specific posts like Tax Assistant in CBIC and CBDT, where a typing test is part of the Skill Test. If you apply for these posts, you will need to type at least 8,000 key depressions per hour on a computer, which roughly means 30 words per minute. For other posts like Inspector, Auditor, or Assistant Section Officer, there is no typing test at all. So, check the post preferences and eligibility carefully before applying.