Capital gains exemption?

Sriram (Project Manager) (28 Points)

06 April 2015  

If I own a Property "A" (Residential) and Property "B" (let out) and I decide to sell Property B (after 3 years-long term) and then re-invest the entire proceeds (including capital gains) is another Property "C", will the Capital Gains be exempt u/s 54?

(Or is it that, since I already own another Residential Property "A", the exemption will not be available? )