By properly combining two prisms made of different materials, it is possible to (A) have dispersion, without average deviation (B) have deviation without dispersion (C ) have both dispersion and average deviation ( D) have neither dispersion nor average deviation

By properly combining two prisms made of different materials, it is po

1.	By properly combining two prisms made of different materials, it is possible to (A) have dispersion, without average deviation (B) have deviation without dispersion (C ) have both dispersion and average deviation ( D) have neither dispersion nor average deviation
Answer» (A) (B) and ( C) (A) and (D) (A) (D) and ( C) (B) and (C ) ANSWER :A