This question asks for the Complementary Coded Decimal (CCD) code for the decimal number 325. While "CCD" isn't a standard term, analysing the options and the provided correct answer suggests it refers to the bitwise inversion of the standard Binary Coded Decimal (BCD) representation for each digit.

Understanding BCD Conversion

First, let's recall the standard Binary Coded Decimal (BCD) representation. In BCD, each decimal digit (0-9) is represented by its unique 4-bit binary equivalent.

• Decimal digit 3 is represented as $0011$ in BCD.
• Decimal digit 2 is represented as $0010$ in BCD.
• Decimal digit 5 is represented as $0101$ in BCD.

Therefore, the standard BCD code for the decimal number 325 is $0011\ 0010\ 0101$.

Calculating the CCD Code for 325

Based on the options, the Complementary Coded Decimal (CCD) code appears to be derived by taking the 4-bit BCD code for each decimal digit and inverting each bit (0 becomes 1, and 1 becomes 0).

Let's apply this process to each digit of 325:

1. Digit 3:
   • BCD representation: $0011$
   • Inverting each bit: $1100$
2. Digit 2:
   • BCD representation: $0010$
   • Inverting each bit: $1101$
3. Digit 5:
   • BCD representation: $0101$
   • Inverting each bit: $1010$

Combining these inverted BCD codes gives the CCD code for 325:

$1100\ 1101\ 1010$

Matching with Options

Now, let's compare this result with the given options:

Our calculated CCD code, $1100\ 1101\ 1010$, matches Option 3.