Me-CHCH₂  +MCPBA/RCO₃H -->  {a}  +KCNS  ---> {b}   find the product a and b

Dear student,

For A,


For B,
the reaction will take place by S_N² mechanism and SCN^​- ion will open up the epoxy ring and will attach to the rightmost carbon .



Hope this helps,

Regards