Computer Science
Assertion. Dictionaries are mutable but their keys are immutable.
Reason. The values of a dictionary can change but keys of dictionary cannot be changed because through them data is hashed.
Python Dictionaries
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Answer
(a)
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
Explanation
A dictionary is a unordered set of key : value pairs and are indexed by keys. The values of a dictionary can change but keys of dictionary cannot be changed because through them data is hashed. Hence dictionaries are mutable but keys are immutable and unique.
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