Kamal says, "Ravi's mother is the only daughter of my mother." In this situation, how is Kamal related to Ravi?

Introduction / Context:
This question involves a small correction of the original wording using the recovery first idea. The natural and standard version is that Kamal says Ravi's mother is the only daughter of my mother. You must then identify how Kamal is related to Ravi. The answer focuses on recognising that Ravi is the child of Kamal's sister, which creates a familiar relation name not explicitly offered in the options.

Given Data / Assumptions:

• Kamal is the speaker.
• Ravi's mother is the only daughter of Kamal's mother.
• Because she is the only daughter, Kamal has no other sister.
• Kamal himself is a child of the same mother and therefore is a sibling of Ravi's mother.

Concept / Approach:
If Ravi's mother is the only daughter of Kamal's mother, then she must be Kamal's sister. Ravi is the child of that sister. A person whose mother is the sister of Kamal is the nephew or niece of Kamal. From Kamal's perspective, he is an uncle of Ravi. The puzzle then checks whether the options given include the word uncle. Since they do not, the most accurate choice among the given options is none of these.

Step-by-Step Solution:
Step 1: Interpret my mother as the mother that Kamal and his siblings share.Step 2: The only daughter of that mother is Ravi's mother. Thus Ravi's mother is Kamal's sister.Step 3: Ravi is the child of Kamal's sister, so Ravi is Kamal's nephew or niece, depending on Ravi's gender.Step 4: Therefore, Kamal is related to Ravi as an uncle.Step 5: The provided options list Grandfather, Father, Brother and None of these. None describes uncle.

Verification / Alternative check:
Construct a simple family example. Let the mother have two children: Kamal and a daughter who becomes Ravi's mother. Ravi is then the next generation, a child of Kamal's sister. In all such trees, Kamal is one generation above Ravi and in a sibling relation with Ravi's parent. That is exactly the definition of uncle. Since uncle is not in the list, the only valid answer among the options is none of these.

Why Other Options Are Wrong:
Grandfather would require Kamal to be the parent of one of Ravi's parents, which is not indicated.Father is wrong because Ravi's mother is clearly stated, and there is no suggestion that Kamal is Ravi's parent.Brother would imply that Kamal and Ravi share parents, which they do not.

Common Pitfalls:
Students sometimes confuse only daughter with only child and assume that Kamal cannot exist as a sibling. Others look for a direct matching label in the options and feel forced to choose father or grandfather simply because they are older male family roles. When the correct relation is missing, remember that none of these is often the intended choice, especially in puzzles that involve an uncle or aunt relation that has been deliberately omitted.

Final Answer:
Kamal is actually Ravi's uncle, so among the given options the correct choice is None of these.