Fact 1: Jessica has four children Fact 2: Two of the children have blue eyes and two of the children have brown eyes. Fact 3: Half of the children are girls. If the first three statements are facts, which of the following statements must also be a fact? I: At least one girl has blue eyes. II: Two of the children are boys. III: The boys have brown eyes.

I only
II only
II and III only
None of the statements is a known fact.

Correct Answer: II only

Explanation:

Since one-half of the four children are girls, two must be boys. It is not clear which children have blue or brown eyes.

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