Now to minimize the terms we have to make kmap but how we will fill entry first see where is B3 one now according to that values put values 1 in kmap for eg: for $1000$ here B3 is 1 so in kmap put value 1 for 1011 and for 1001 is also B3 is 1 now put value 1 for 1100 .. and Make 4 kamp with respect to different output .