Question: Which widely acclaimed singer on the soundtrack of Ramu defined feminism in South Indian Cinema?
Sentence (from "Ramu (1968 film)"): The soundtrack of the film was composed by R. Goverdhanam and songs rendered by Ghantasala Venkateswara Rao and P. Susheela, most memorable one "Raa Raa Krishnayya".
Relevant evidence: Yes