Ans 2: (Master Answer)
D
L → It has no definite volume → It can be compressed → So, L can be a gas like oxygen or nitrogen.
M → It has a definite volume → It does not have a definite shape → So, M can be a liquid that takes the shape of the container in which it is kept..
N → It has a definite volume → It has a definite shape → So, N can be a solid whose molecules have strong force of attraction between them and are very tightly packed.