54F Exemption

Mr.X has sold a site for 50 lakhs in April, 2016. He wants to claim exemption u/s.54f and so he purchased another site for 55 lakhs in August, 2016. He wants to complete the construction of house within 3 years with other funds. Now ( in March, 2018) he wants to sell another site for 75 lakhs and invest this amount for the construction of house, which he earlier claimed as exemption in the year 2016. Can he claim exemption now u/ s 54f.