Dear Amulya,
Choice is urs if Sale consideration is not apportioned between Land & Building then Entire Gain will be treated as "Short Term" & in this case Exemption u/s 54 &/or 54EC cannot be claimed.
So better is to go for apportionment of sale consideration for taxation purposes -
1) Gain arising on Transfer of Land will be treated as Long Term. So Lower Rate of Tax i:e 20%
2) Benefit of Indexation of Cost will be available
3) Gain on Land can be claimed exempt u/s 54EC &/or 54F
4) Whereas Gain on Sale of Building will be treated as "Short Tem" & no benefit is available unlike in case of Land.
While apportioning sales consideration, provision of Sec 50C should be kept in mind.
In composite sales, gains must be bifurcated into long-term and short-term - Where the land is a long-term capital asset and the building thereon is a short-term capital asset, and both are sold together for a consolidated consideration, the gains must be bifurcated into long-term (pertaining to land) and short-term (pertaining to building) and brought to tax, since the land is an independent and identifiable capital asset, and it continues to remain so even after the construction of building - CIT v. Dr. D.L. Ramachandra Rao [1999] 236 ITR 51 (Mad.).
Well regarding How to apportion Sale Price - I am not sure but think that Valuation done by registered valuers and all would do....