The question says Beena got married 8 years ago, her present age is 1 1/4 times her age at marriage, and her daughter's age is 1/10th of her present age, asking for the daughter's age. Since her present age must satisfy both the "8 years since marriage" fact and the "1 1/4 times" ratio at once, we can test each option by working backward from the daughter's age to check consistency.
Only a present age of 40, giving a marriage age of 32, satisfies the 1 1/4 times relationship described in the question, which fixes the daughter's age.
Therefore, the correct answer is 4 years.
The question says Beena got married 8 years ago, her present age is one and a quarter times her age at marriage, and her daughter is one tenth of her present age, then asks for the daughter's age. Setting up her age at marriage as a single unknown and solving the resulting equation directly gives her present age, which then fixes the daughter's age.
Solving the marriage-age equation directly gives \( m=32 \) and a present age of 40, which fixes the daughter's age at exactly 4 years.
Therefore, the correct answer is 4 years.