Question 2
How are mass and weight classified as scalar and vector quantities?
The right answer is the one marked above.
Mass is scalar; weight is vector. Stating a mass needs a magnitude only — "5 kilograms" is a complete description.
Weight is a force, and a force has a direction — always towards the centre of the earth. So weight is a vector quantity.
An easy way to remember: if weight is a force, and force is a vector, then weight must be a vector too.