Spot Nifty is at 5000. One month Nifty call with strike price of Rs. 4800 is trading at Rs. 250 per call. An investor buys 100 Nifty calls. At expiry Nifty closes at 5500. Net profit / loss of the investor is Rs. ___.
A . 50000
B . -50000
C . 45000
D . -45000
Answer: C