New Delhi: The BJP Parliamentary Board met here to discuss the results of the election to the five state assemblies.
The saffron party said the result of each assembly is state-specific.
"An anti-incumbency wave factor due to lack of actual development has impacted the result in West Bengal. Corruption and family nepotism has influenced the election results in Tamil Nadu," said the BJP.
While Mamata Banerjee rewrote history by unseating the Left after 34 years in West Bengal, J Jayalalithaa in Tamil Nadu returned to power on Friday in state assembly polls conducted in April-May.
The BJP said lack of united opposition led to Congress victory in Assam.
"The BJP regrets that the lack of opposition unity resulted in the absence of a credible alterative in Assam," it said.
Assam Chief Minister Tarun Gogoi led his party into a straight third win with the Congress getting well beyond the majority mark.