Step 1: Understanding the question.
In Python, strings can be written using single, double, or triple quotes. This allows flexibility in how strings are represented.
Step 2: Analyzing the options.
(A) numeric: This is incorrect. Numeric values are written as numbers, not using quotes.
(B) Boolean: This is incorrect. Boolean values `True` and `False` are not written using quotes.
(C) string: Correct — Strings in Python can be enclosed in single quotes (`'`), double quotes (`"`), or triple quotes (`'''` or `"""`).
(D) real: This is incorrect. Real numbers are written as numeric values, not as strings.
Step 3: Conclusion.
The correct answer is (C) string, as strings in Python can be written using various types of quotes.