For the endothermic reaction3A(g)⇌B(g)+C(g), select the option(s) by which equilibrium concentration of A(g) can be increased ?

For the endothermic ..........⇒On temp↓, reaction moves in backward direction, [A(g)] will increase. ⇒On decreasing volume, concentration of all species will increase. ⇒On adding B(g), reaction will move in backward direction, [A(g)] will increase.