To complete this sentence, the user needs to know the appropriate verb that fits grammatically and contextually. The sentence is a line from a Bollywood song, and the correct answer is:

The Answer is: A. Rehti

Explanation: The correct sentence is "Pal Pal Dil ke pass tum Rehti ho," which means "You stay close to my heart every moment." Option A correctly fills in the blank with the verb "Rehti," which means "stay" or "reside." Option B, "kehti," means "say" and does not fit the context of the sentence. Option C, "sehti," means "tolerate" or "suffer," which also does not make sense in the context of the sentence. Option D, "baithi," means "sit," which is grammatically incorrect and does not make sense in the sentence.