Question

How many sisters does Sunny have? (I) Sunny is the only son of his parents. (II) Sunny’s parents have three children.

• A. Only statement I alone is sufficient
• B. Only statement II alone is sufficient
• C. Statements I and II together are sufficient
• D. Either statement I or II alone is sufficient

Answer 1

The Correct Option is C

To determine how many sisters Sunny has, statements I and II together are sufficient to answer the question.

Additional Context:

• Statement I: "Sunny is the only son of his parents."
  • Implies Sunny has no brothers (only son)
  • Does not specify the number of sisters (could be 0 or more)
  • Insufficient alone as it doesn't give sister count
• Statement II: "Sunny’s parents have three children."
  • Indicates total siblings = 3 (including Sunny)
  • Does not specify gender distribution
  • Insufficient alone as sisters could be 0, 1, or 2
• Combined analysis:
  • From I: Only son ⇒ no brothers
  • From II: Total children = 3
  • Thus, Sunny + 2 sisters (since he's the only son)
  • Conclusion: Sunny has 2 sisters
• Key points:
  • Neither statement alone provides complete information
  • Together they uniquely determine sister count
  • This is a classic example of logical sufficiency in reasoning questions

Correct Answer: (3) Statements I and II together are sufficient to answer the question.