Multiple choice

A code word of length $4$ consists of two distinct consonants in the English alphabet followed by two digits from $1$ to $9$ with repetition allowed in digits. If the number of code words so formed ending with an even digit is $432\times k$, then $k$ is equal to

  1. $7$
  2. $5$
  3. $49$
  4. $35$
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A Correct answer