Long Capital gains exception

Yes, you can claim exemptions from long term capital gains [LTCG] under more than one provisions. Like Investing in new residential property and specified bonds U/s. 54EC.

If cost of new property exceeds your LTCG, there is no tax. But if cost is below to LTCG, the exemption is restricted to the cost of new property. - Sec. 54

You cannot invest in government bonds to claim exemption from LTCG, it is only the specified bonds U/s. 54EC that you have to invest. i.e 3 years Bonds from NHAI, Rural Electrification Corporation