Select the correct direct form of the given sentence.
Praveen told his mother that he had completed his homework.

Correct option is B

The correct direct form of "Praveen told his mother that he had completed his homework" is: Praveen said to his mother, “I have completed my homework.”
The past perfect tense in indirect speech (had completed) changes to present perfect (have completed) in direct speech. “told” changes to “said to” in direct speech.