What is the unit digit in the multiplication of 1 × 3 × 5 × 7 × 9 × ... × 999?

उत्तर दाखवा आणि स्पष्टीकरण

उत्तर: (C) 5

स्पष्टीकरण

The product of odd numbers including 5 ends in 5. (Answer as per the official UPSC answer key.)