The cost of a pencil and an eraser is Rs.0.70. Priya bought 3 pencils and 4 erasers and paid Rs.2.40. How much do 2 pencils and 2 erasers cost?

• A.  Rs.3.40                                
• B.  Rs.2.50
• C.                         Rs.1.40
• D.                         Rs.1.10