In decipher jumbled up description type of questions, a round-about description is given in the form of certain small relationships and direct relationship between the persons concerned is to be deciphered.
Pointing to a photograph, a lady tells Pramod, "I am the only daughter of this lady and her son is your maternal uncle." How is the speaker related to Pramod`s father ?
Clearly, the speaker's brother is Pramod's maternal uncle
So, the speaker is Pramod's mother or his father's wife.