On a beach, Renu is running with her children when she meets Vishal and Laxmi. Vishal introduces Ravi to the children saying, "This person is the daughter of your mothers fathers mother and is my sister." How are Vishal and Laxmi related to Renu?

Introduction / Context:
This is a multi generation blood relation problem with a long phrase describing one ancestor: "your mothers fathers mother". The key is to carefully unfold this phrase one step at a time and then use it to identify how Vishal and Laxmi, who are linked to that ancestor through Ravi, are related to Renu.

Given Data / Assumptions:

• Renu is on the beach with her children.
• They meet Vishal and Laxmi.
• Vishal introduces Ravi to the children saying, "This person is the daughter of your mothers fathers mother and is my sister."
• "Your mother" refers to Renu when Vishal speaks to Renu children.
• We are told that Ravi is a sister of Vishal, so Vishal and Ravi share the same parents.
• We assume that Laxmi is Vishal wife, which is the usual intent in such questions when a male and female are mentioned together.

Concept / Approach:
The main phrase to decode is "your mothers fathers mother". For Renu children, "your mother" is Renu. The father of Renu is their maternal grandfather. The mother of that grandfather is their great grandmother. The daughter of that great grandmother is a woman in the grandparent generation of Renu, most naturally a sister of Renu maternal grandfather, that is, a grandaunt of Renu.

Step-by-Step Solution:
Step 1: For Renu children, "your mother" is Renu.Step 2: "Your mothers father" is Renu father, who is the maternal grandfather of the children.Step 3: "Your mothers fathers mother" is the mother of that grandfather, that is Renu great grandmother.Step 4: "Daughter of your mothers fathers mother" is a daughter of Renu great grandmother. That daughter is a sister of Renu grandfather, which makes her a grandaunt of Renu and a great grandaunt of Renu children.Step 5: Vishal says that Ravi is that daughter and also his sister. Therefore both Ravi and Vishal are children of Renu great grandmother, making them granduncle and grandaunt figures for Renu.Step 6: So, from Renu own perspective, Vishal is her granduncle and Ravi is her grandaunt. Laxmi, as Vishal wife, would be granduncle wife and therefore treated as grandaunt as well.Step 7: Among the given options, the best approximate description in everyday terms is that Vishal and Laxmi are uncle and aunt to Renu.

Verification / Alternative check:
Think in terms of generations. Generation 1: Renu great grandmother. Generation 2: her children, including Renu grandfather and his sister Ravi. Vishal is Ravi brother, so he is also in Generation 2. Generation 3: Renu parents. Generation 4: Renu herself. In many languages, both granduncles and uncles can be casually addressed with the same label, and reasoning questions usually simplify generations for options, so "uncle and aunt" is the intended choice.

Why Other Options Are Wrong:
Brother and sister would place Vishal and Laxmi in the same generation as Renu, which is not consistent with the description of Ravi as a daughter of Renu great grandmother. Father and mother would place them one generation above Renu, but the structure shows they are one more step above, attached to great grandmother, not directly to Renu as parents. "Can't determine" is incorrect because the chain is precise enough to fix their generation and broad relation type.

Common Pitfalls:
The most common difficulty is miscounting the "mother" and "father" levels and thinking the described woman is Renu grandmother instead of grandaunt. Even if there is some confusion about the exact label granduncle or uncle, the exam options are usually written in everyday words such as uncle and aunt, so you should select the closest match by generation and role.

Final Answer:
Vishal and Laxmi are related to Renu as uncle and aunt in family terms.