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If S1, S2, S3... are S-expressions then list: (S1 S2 S3 ....) is a/an ____
Correct Answer: C — S-expression
Explanation:
According to recursive definition of S-expression if S1, S2, S3... are S-expressions then list: (S1 S2 S3 ....) is also an S-expression. S-expression is short form of symbolic expressions.