The correct answer is A. Only conclusion I follows.
The first statement is in the form of “No A is B.” This means that the set of A is a subset of the complement of B. In other words, every element of A is not an element of B.
The second statement is in the form of “All C are B.” This means that the set of C is a subset of B. In other words, every element of C is an element of B.
The first conclusion is in the form of “No C is A.” This is the contrapositive of the first statement. The contrapositive of a statement is formed by negating both the hypothesis and the conclusion. In this case, the hypothesis is “No A is B” and the conclusion is “No C is A.” The contrapositive is “No C is A” implies “No A is B.”
The second conclusion is in the form of “Some C are A.” This is not a valid conclusion. The second statement does not provide any information about the relationship between A and C. In other words, the second statement does not tell us whether or not there are any elements of A that are also elements of C.
Therefore, the only valid conclusion is I. No camera is magazine.