Correct option is A
The correct answer “
is much faster than my old one”. The sentence uses the incorrect comparative form of the adjective 'fast'. The comparative form of 'fast' is 'faster'.
Option (b) "is much more fast than my old one" is incorrect because it uses "more fast" which is not grammatically correct. The correct comparative form of "fast" is "faster".
Option (c) "is much faster from my old one" is incorrect because it uses the preposition "from" which is not appropriate in this context. The correct preposition to use when comparing two things is "than".
Option (d) "is much fastly than my old one" - This option is incorrect because it uses the adverb "fastly" which is not a correct adverb form. The correct adverb form of "fast" is "faster".
Therefore, the sentence formed will be "The new laptop is much faster than my old one."