JEE Main Physics question

A spring of spring constant 5 × 10³ N m⁻¹ is stretched initially by 5 cm from the unstretched position. Then the work required to stretch it further by another 5 cm is

• (A)12.50 N-m
• (B)18.75 N-mCorrect
• (C)25.00 N-m
• (D)6.25 N-m