MUMBAI, April 6 -- Ashok Kumar, 36, an assistant manager with a Gurugrambased multinational company, was among the happy lot of homebuyers when the Goods and Service Tax (GST) Council announced the reduction in GST rates last month on under-construction houses. About six months ago, Kumar bought an under-construction apartment in Gurugram that came under the Haryana government's affordable housing scheme for Rs 21 lakh. He has paid about Rs10 lakh so far, along with GST at the rate of 8%. After the GST Council slashed the rate on affordable housing projects to 1% from 8%, Kumar was hoping to save Rs 77,000 on the remaining Rs 11 lakh he has to pay the developer....