A. पॉप
B. रिमूव
C. अपडेट
D. सम

Solution

D. sum

Explanation

The functions sum, min and max cannot be used on mixed type (heterogeneous) sets. The functions pop, remove, update etc can be used on homogenous as well as heterogeneous sets. An example of heterogeneous sets is: {‘abc’, 4, (1, 2)}