To answer this question, we need to understand the concept of film production and the producer's role.
Option A) Ravichandran - This option is incorrect because Ravichandran is a well-known actor and director in the Indian film industry, but he is not a producer.
Option B) Kaja Moideen - This option is correct because Kaja Moideen is a film producer in the Indian film industry. He has produced several films, including the movie "Roja."
Option C) Siva Prasad Reddy - This option is incorrect because Siva Prasad Reddy is a film producer in the Telugu film industry, but he is not associated with the movie "Roja."
Option D) Krishna Ramana - This option is incorrect because Krishna Ramana is a screenwriter and lyricist in the Indian film industry, but he is not a producer.
The correct answer is Option B) Kaja Moideen. He is the producer of the movie "Roja."