Question

Assertion (A): The output of addition of two series will be NaN, if one of the elements or both the elements have no value(s).

Reason (R): While performing mathematical operations on a series, by default all missing values are filled in with 0.

Options

• Both (A) and (R) are true and (R) is the correct explanation for (A).

• Both (A) and (R) are true and (R) is not the correct explanation for (A).

• (A) is true and (R) is false.

• (A) is false but (R) is true.

Answer 1

(A) is true and (R) is false.

Explanation:

1. Assertion (A): If one or both elements have no values, the addition of two series will produce NaN.
   True: When adding two series in pandas, missing values (NaN) in any series will result in NaN in the output by default.
2. Reason (R): When executing mathematical operations on a series, all missing values are automatically filled up with zero.
   False: Missing values are not automatically replaced with 0 unless expressly stated by methods such as fillna().