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QusWhich of the following is an invalid variable? Qusनिम्नलिखित में से कौन सा एक इनवैलिड वैरिएबल है?


A. my_string_1
B. 1st_string
C. foo
D. _myvar


Solution
B. 1st_string



Explanation
Variable names should not start with a number.
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