Along with Dr Singh, AGP candidate Kumar Deepak Das also won the second RS seat from the state.
A party leader asserted that the AGP respected the sentiments of common people, who were wary that the law might threaten their identity and existence.
Muslims across the country have joined the agitation, apprehending that the move could be a precursor to a country-wide NRC.
The United Progressive Alliance government's efforts to extend a friendly hand to the Sheikh Hasina government in neighbouring Dhaka were thwarted by West Bengal Chief Minister Mamata Banerjee whose party joined hands with the Adom Gana Parishad in the Rajya Sabha on Monday, ensuring that the Constitution Amendment Bill ratifying the Land Boundary Agreement with Bangladesh could not be introduced.