Members of the city-based NGO Durbar Mahila Samanway Committee - a leading body of sex workers in the state - and Association of Trans-gender in Bengal Wednesday filed a petition to the WBHRC detailing the complaint.
A commission official said both bodies complained they felt "insulted and humiliated" at the remarks and sought the commission's intervention.
Sex workers in West Bengal. Photo: AFP
The commission has assured to look into the matter.
On Jan 28, a senior All India Forward Bloc leader had termed the Trinamool "opportunistic" and compared its behaviour to that of a sex worker.
Hitting back, a Trinamool minister had then dubbed the Forward Bloc as a trans-gender for its inability to protest against the atrocities of the CPI-M during the Left Front rule.