Which Python variable names are invalid?

a) 12MonthsTotal_Pay

b) TotalPay$

c) Total_January2019

d) JanuaryRateln%

(A) 12MonthsTotal_Pay (B) TotalPay$ and (D) JanuaryRateIn%

Explanation:

B and D feature symbols and signs, which aren't allowed in variable names of python. Variables cannot start with numbers, either, so A is invalid. C is the only right answer

In the following question, Option (a), Option (b), and Option (d) is correct because in Python programming language we not defined variable in these types.

Explanation:

a). 12MonthsTotal_Pay = 5

output:

SyntaxError: invalid syntax

Because variable is not start with numbers.

b). TotalPay$ = 7

output:

SyntaxError: invalid syntax

Because the variable is not supported any symbol.

d). JanuaryRateln% = 12

output:

SyntaxError: invalid syntax

Because the variable is not supported any sign and symbol.