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Point out the wrong statement.

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Point out the wrong statement.

(a) Literals can be of any type

(b) CURRENT cannot be rebound

(c) MongoDB parses string literals that start with a dollar sign $

(d) None of the mentioned

The question was asked in semester exam.

My question is based upon Aggregation Mechanics topic in section Aggregation Concepts and Aggregation Mechanics of MongoDB

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Right answer is (b) CURRENT cannot be rebound

The best explanation: Along with the CURRENT system variable, other system variables are also available for use in expressions.

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