JEE Main Chemistry question

The solutions and are 0.1 and 0.2 molar in a substance. If 100 mL of are mixed with 25 mL of , and there is no change in volume on mixing, then the final molarity of the solution is:

• (A)0.15 M
• (B)0.18 M
• (C)0.12 MCorrect
• (D)0.30 M