The correct answer is A. 1111012.
To convert a decimal number to binary, you can use a process called long division. Start by dividing the decimal number by 2. The remainder will be the first digit of the binary number. Then, divide the quotient by 2 and take the remainder as the next digit of the binary number. Continue this process until the quotient is 0.
In this case, 6110 ÷ 2 = 305 with a remainder of 1. 305 ÷ 2 = 152 with a remainder of 1. 152 ÷ 2 = 76 with a remainder of 0. 76 ÷ 2 = 38 with a remainder of 0. 38 ÷ 2 = 19 with a remainder of 0. 19 ÷ 2 = 9 with a remainder of 1. 9 ÷ 2 = 4 with a remainder of 1. 4 ÷ 2 = 2 with a remainder of 0. 2 ÷ 2 = 1 with a remainder of 0.
The binary number is 1111012.
Option B is incorrect because it has an extra 0 at the end. Option C is incorrect because it has an extra 1 at the end. Option D is incorrect because it has a 0 in the second place from the right. Option E is incorrect because it is not a valid binary number.