Pick the correctly punctuated form of the given sentence.
lal bahadur shastri was an exemplary leader wasn’t he
Lal Bahadur shastri was an exemplary leader, wasn’t he?
Lal Bahadur Shastri was an exemplary leader wasn’t, he?
Lal Bahadur Shastri was an exemplary leader, wasn’t he?
Lal Bahadur Shastri was an exemplary leader wasn’t he?