Selling a flat which was obtained by gift deed

(1) she sell this property. And for tax purpose u contact your C.A., he give a batter advise for that. 

Hello Mr. Patil

I really appreciate your quick reply, but I am still having some doubts about this transaction

However, I think option 2 as LTCG and answer for question 3 cannot be correct at the same time.

In question 3, option D says it is STCG

Please suggest what will be consider as date of purchase and what will be profit?

Case is again mentioned below:

My sister and Brother-in-Law brought the flat in Mumbai on 17th Oct, 2009 in 15 lacs.

They gifted the property to my Mother on 5th April, 2013. My mother paid the Stamp Duty and Registration Fee.

Now, my mother wants to sell her property in 35 lacs?

Questions:

A. What will be consider as date of purchase?

    a. Is it date of purchase by my sister (17th Oct, 2009)

    b. Is it date of purchase/obtain via gift deed by my mother (5th April, 2013)

B. What will be profit while calculating Capital Gain?

    a. Is it selling price (35 lacs) - purchase price by my sister (15 lacs) = 20 lacs

    b. Is it selling price (35 lacs) - purchase price by my mother (0 lacs) = 35 lacs

C. Capital Gain is Long Term Capital Gain (LTCG) when property holding period is more than 3 years

     a. Am I right? or is it different from 3 years. If it is not 3 years, then what is the period

     b. Will my mom transaction be consider as LTCG (more than 3 years)

     c. Will my mom transaction of selling be consider as STCG (less than 3 years)