for my skoda fabia i have changed the spark plugs but i think those were wrong, bought from amazon. those are for LPG CNG cars instead of petrol. since then my car is sluggish. is this the reason car is not accelerating.
Cause and effect… could very well be a reason. Swap them to the correct plug. don’t depend on Amazon to tell you if it is the right spark plug, their search engine for auto parts is pretty poor - as you found!
Yes. Almost always the best plugs are the ones specified by the carmaker when the car was new. Anything else is an experiment and quite possibly a mistake.