Gate: 20i cro baeyer-iliger oxidaton, med mepba

in Baeyer- viliger oxidation if you use acidic medium peoxides or alkylsilylperoxides or MCPBA, lactone and also steric carbonyls give lactone.

There are two reasons. ist Carbonyl is more reactive 2nd since it is a bridging compound so baeyer villiger oxidation give some relaxation by increasing the size of the ring

m-cpba attacks alkene to form epoxides but here it proceeds through baeyer villeger oxidation. Here m-cpba attacks at carbonyl group as carbonyl group is more reactive than alkene....

because here reactivity of carbonyl is more than alkene. it accept H+ from peroxide. check the complete mechanism.