2.The case of the petitioners is that their father had purchased a house plot in Plot No.495/W, Old No.21, New No.37, 4th Cross Street, Indira Nagar, Adyar, Chennai – 20 of an extent of 1 ground and 600 sq.ft., comprised in T.S.No.46 parts, block No.13 of Kalikundram Village, Mylapore – Triplicane Taluk, Chennai by way of an allotment order dated 01.08.1970 by the TNHB on the basis of his application dated 30.01.1970. Thereafter, the petitioners father mortgaged the property on 01.11.1973 in favour of the Governor of Tamil Nadu for a sum of Rs.18,400/- for the construction of a dwelling house and repaid the entire loan amount and became the absolute owner of the property.