Explanation : To find the boolean function here we will use K-map Select neighboring Minterms as max as possible in powers of 2 ie 2,4,8 and so on.
Here we have selected group of minterms: First we will take 8 minterms group which will give us B. Now take 4 minterms group it will give us CD. Another 4 minterms group will give us AD. We have the expression B + CD + AD. which can be reduced as B + D ( A + C ) So, option (A) is correct.
Explanation : First we will make pair of 3 bits from LSB : ie- 1 011 101 011 now convert these bits into decimal and that will be 1 - 1 011 - 3 101 - 5 011 - 3 so the answer will be 1353.
So, option (B) is correct.