S. 69: Unexplained investments-Purchase of house property-Residential house was purchased in joint names by the assessee along with his wife-Explained the source of investment-Addition was not valid-Reassessment-Information was received from the office of the Sub-Registrar under s. 285BA Sanction for reassessment was valid-PCIT has recorded the satisfaction-Approval was valid. [S. 133(6), 147, 148, 151, 285B]