Sale of unlisted shares - capital loss

I have a query for experts in this forum

I had invested an amount of Rs 17 lakhs in an unlisted company as a private equity investment in March 2015. On account of losses in the invested entity business, I sold off the investment for Rs 11.3 Lakhs in August 2018, after a period of 3 years and 5 months, resulting in a loss of Rs 5.7 Lakhs. All of the buy and sell transactions are off-market transactions. The query I have is

1. Is this transaction a long term capital loss?
2. Can I offset the loss of Rs 5.7 lakhs that I have incurred against
   1. Any potential long capital gains from equity
   2. Any potential long term capital gains from sale of property
3. Besides claiming capital loss, can I also apply indexation?

Shall appreciate advice experts

Look forward to hearing from you

regards

P S Krishnan