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Which symbol is used to start a comment?

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Which symbol is used to start a comment? (a) / (b) $ (c) # (d) ? The question was posed to me in exam. The question is from Getting Started with R in chapter Sockets of JavaScript Select the correct answer from above options JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

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Right answer is (c) # Explanation: ‘#’ is used to comment a line. A single line comment can be made in R.

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