What is the correct comparative form of the adjective "Bad"?

Correct option is B

The comparative form of bad is worse, and the superlative form is worst.
· (a) "Badder" is not a valid word.
· (c) "Baddest" is incorrect for standard grammar (though used informally).
· (d) "Bade" is the past tense of "bid" and unrelated.
Thus, the correct answer is (b) Worse.