We’re rewarding the question askers & reputations are being recalculated! Read more.
3 of 3 added 10 characters in body; edited tags

Which vs what. What to choose when?

Can someone give me clear rules when to use "what" and when "which" in case of sentences like " which/what "

Examples:

"My access is arranged which/what saved a lot of time"

"Studies have shown that strawberries contains X which/what have alarmed scientists"

"I bought a car which/what will reduce my daily travel time."

Thanks.