Discussion

Explanation:

Here, XX and YY are multiples of 11, hence their sum ABA should also be a multiple of 11.

Also, sum of 2 2-digit numbers cannot exceed 198.
∴ A = 1 and ABA = 1B1.

Now, 1B1 should be a multiple of 11. This is only possible when B = 2.

Hence, A = 1 and B = 2

⇒ A + B + A = 1 + 2 + 1 = 4

Hence, option (a).

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