In some programming languages, an identifier is permitted to be a letter followed by any number of letters or digits. If L and D denotes the set of letters and digit respectively. Which of the following expression defines an identifier?

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Q.) In some programming languages, an identifier is permitted to be a letter followed by any number of letters or digits. If L and D denotes the set of letters and digit respectively. Which of the following expression defines an identifier?

(A) (L + D) *

(B) (L.D) *

(D) L(L.D) *

Correct answer : Option (C) - L(L + D) *

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