Book Value
Book value is what would be left over for shareholders if the company were sold and all its loans were paid off.
It is calculated by subtracting total liabilities (money owed) from total assets (all that it owns) and dividing the result by the total number of shares.
In technical terms, BV is the accounting value of a firm.
So a BV of Rs 39 would indicate what each share owner would get at this point if the company liquidated.