Correct option is D
Draw family tree using following notations:
Let us first decode the given symbol and then draw a family tree.
Preetam + Monika - Aloke means Preetam is the son of Monika and Monika is wife of Aloke.
Clearly, we can see that Preetam is son of Aloke.
Hence, the correct answer is "Preetam is the son of Aloke".