Ltcg exemtion on 2nd house property

1.  A owned  house property  1 and 2,  both for more than 3 years. 

2.  A sold property 1 and acquired House property 3 and claimed CG exemption U/S 54 fullfilling all conditions . 

   While the admitted refund is pending due to wrong credit of TDS ( due to CPC technical issue) is being restored, 

3. Can A sell house property 2  and also seek exemption subject to  U/S 54 conditions ? 

4. Can Exemption U/S 54 be claimed on the sale of House property 3 after year 3 year holding ?

5. House property 1 was acquired by settlement while house property 2 was aquired by purchase,  has it any relevance ?

6. Does  "ONE HOUSE PROPERTY" means one can claim exemption U/S 54 only once in life time for ONE HOUSE PROPERTY 

 Some clarity soon on this status will be helpful

Thanks