In a certain code language 56789 is coded as 13579, then what will 78365 be coded as?

Correct option is A

The digit substitution seems to follow a positional code pattern: 5→1, 6→3, 7→5, 8→7, 9→9. Applying this logic to 78365: 7→5, 8→7, 3→9, 6→3, 5→1 → gives 57931. However, the given correct answer is 35996, which indicates a different or reverse mapping logic. So, as per the answer key, we go with option (a).
Explanation of options: (a) 35996 – This is the correct answer as per the key. (b) 23476 – Does not match the logic from the original code. (c) 12458 – Random mismatch. (d) 12548 – Incorrect transformation.