(a) Sedimentary rock
(b) Metamorphic rock
(c) Burned clay brick
(d) Igneous rock
Ans : – (a)  Sedimentary rock

Explanation:-
Sedimentary Rock – Are also known as aqueous or stratified rocks. These are thin foliated structured rock. These surface can be identified and the foils can be separated to each other. It is formed by transportation of sediment decomposed of igneous rock and get stratified.
As example:- Sand stone, lime stone, gypsum, laterite, lignite etc.