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The question has a set of four statements. Each statement has three segments. Choose the alternative where the third segment in the statement can be logically deduced using both the preceding two, but not just from one of them.

1. Citizens of Yes Islands speak only the truth. Citizens of Yes Islands are young people. Young people speak only the truth.
2. Citizens of Yes Islands speak only the truth. Some Yes Islands are in Atlantic. Some citizens of Yes Islands are in the Atlantic.
3. Citizens of Yes Islands speak only the truth. Some young people are citizens of Yes Islands. Some young people speak only the truth.
4. Some people speak only the truth. Some citizens of Yes Islands speak only the truth. Some people who speak only the truth are citizens of Yes Islands.
1. A only
2. B only
3. C only
4. D only

$\text{Option A is wrong}$ beacuse set young people contain yes island people but it did not conatin only yes island ; it may have more kind of people which can speak false also.

$\text{Option B}$ is also wrong bcoz third statement cannot determind by first $2$ statements .

$\text{Option C is correct}$ because all yes island people speak truth and some young people are the citizen of yes island so it is straightforward that some young people will definitely speak truth ..
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