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Priyanka remembers that her husband’s birthday is after 19th but before 22nd December whereas her mother-in-law remembers that the birthday of her only son is after 20th but before 24th December. If both of them are right, which day is Priyanka’s husband’s birthday?

Priyanka remembers that her husband’s birthday is after 19th but before 22nd December whereas her mother-in-law remembers that the birthday of her only son is after 20th but before 24th December. If both of them are right, which day is Priyanka’s husband’s birthday? Correct Answer 21<sup>st</sup> December

Preparing the family tree using the following symbols

From the above family tree, it is clear that Priyanka's husband is the only son of her mother-in-law.

Now, Priyanka remembers that her husband’s birthday is after the 19th but before 22nd December

Therefore, according to Priyanka, her husband's birthday is either on 20th or 21st December.

Priyanka's mother-in-law remembers that Priyanka's husband's birthday is after the 20th but before 24th December.

Therefore, according to Priyanka's mother-in-law, Priyanka's husband's birthday is either on 21st, 22nd, or 23rd December.

Now, if we consider that both of them are right then the cutoff date for her husband's birthday is after the 20th but before 22nd December.

The only date which lies between 20th and 22nd December is 21st December.

Hence, the correct answer is 21st December.

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