West Bengal Chief Minister Mamata Banerjee on Tuesday announced that her government has started a survey to enumerate the population of the Mahato community amid their long-pending demand for Scheduled Tribe (ST) status. Addressing an administrative programme here, she said her government would also write to the Centre seeking recognition of Sarnaism as a separate religion as being demanded by tribals, and asserted that if it is not given, she would start a massive demonstration. Banerjee also said if the Centre does not clear the "dues" of the PM Awas Yojana by April 1, her government will build 11 lakh houses for the beneficiaries under the scheme. "The Mahatos have a long-standing demand to declare them as STs. But, I will tell them that it is not in my hands. So, please do not blame me for it. I would like to inform you that we have started a geographical survey to find the actual percentage of the Mahato population in the state. We have over 6 per cent tribal population in West