The BCD equivalent of 135 is 0001 0011 0101.

BCD stands for Binary-Coded Decimal. It is a way of representing decimal numbers in binary form. In BCD, each decimal digit is represented by a 4-bit binary number. The BCD equivalent of 135 is 0001 0011 0101, which is the binary representation of the decimal digits 1, 3, and 5.

1 = 0001
3 = 0011
5 = 0101
∴ 135 = 000100110101