Gayatri says, "If Farhan gives me Rs. 30, then he will have half of what Shehzad has, but if Shehzad gives me Rs. 30, then the three of us will have an equal amount. How much amount does Shehzad have?"

• A. Rs. 30
• B. Rs. 120
• C. Rs. 90
• D. Rs. 60