Lambda functions cannot be pickled because:
(a) Lambda functions only deal with binary values, that is, 0 and 1
(b) Lambda functions cannot be called directly
(c) Lambda functions cannot be identified by the functions of the pickle module
(d) All lambda functions have the same name, that is, <lambda>
I got this question in an online quiz.
My query is from Pickle Module topic in portion Mapping Functions and Modules of Python