Here, instead of actually evaluating the value, we observe that the unit digit in each option is different, therefore we can very quickly eliminate non-possible answers by finding the unit digit of the expression ( A09D) --- finding the unit digit is very easy
Since A stands for 10, so we can ignore it, so focus on 9 and D, i.e unit digit of 3 + 9x16 is 3+ 4 i.e 7,,so the right answer has to have 7 as unit digit, we observe that it is option C