X'61626364' and X'61626364' are respectively . . . . . . . .

Answer: Option A

This question is about how MySQL stores and interprets data in different formats. Let's break it down:
X'61626364' This is a hexadecimal representation of data. Think of it like a code for letters.
'abcd' This is a simple string of letters.
The Question: The question asks what X'61626364' is equivalent to (both in terms of a string and a number).
The Answer:
* X'61626364' represents the letters 'abcd' in hexadecimal.
* The number 4297383361 is the decimal equivalent of the hexadecimal value '61626364'.
Therefore, the correct answer is Option B: abcd and 4297383361