NRI selling property in India after 18 years

I wanted to know if LTCG exemption is still allowed even if the builder of the new residential construction fails to hand over the property to the taxpayer within 8 years of purchase.

Escape window 2: LTCG on these instruments realised after 31.3.2018 by an individual will remain tax exempt up to Rs 1 lakh per annum i.e. the new LTCG tax of 10% would be levied only on LTCG of an individual exceeding Rs 1 lakh in one fiscal.