Identify the options which reflect the impact of simultaneous shifts of demand and supply on equilibrium

(A) When demand shift right and supply left, quantity may increase, decrease or remain unchanged but price decreases

(B) When demand and supply shift leftward, quantity decreases but price may increase, decrease or remain unchanged

(C) When demand and supply shift rightward, quantity increases but price may increase, decrease or remain unchanged

(D) When demand shift left and supply right, quantity may increases, decreases or remain unchanged but price decreases

Option 1 -> Incorrect. Statement (A) is wrong as it states price decreases when demand shifts right and supply shifts left, but actually price increases in this scenario.

Option 2 -> Incorrect. Statement (A) is wrong as explained above.

Option 3 -> Incorrect. Statement (A) is wrong as explained above.

Option 4 -> Statements (B), (C), and (D) are correct. Let me verify each:

(B) Both demand and supply shift left: Demand left decreases both P and Q; Supply left increases P but decreases Q. Net effect: Q definitely decreases, P is ambiguous. ✓

(C) Both demand and supply shift right: Demand right increases both P and Q; Supply right decreases P but increases Q. Net effect: Q definitely increases, P is ambiguous. ✓

(D) Demand shifts left, supply shifts right: Demand left decreases both P and Q; Supply right increases Q but decreases P. Net effect: P definitely decreases, Q is ambiguous. ✓

(A) is incorrect because when demand shifts right and supply shifts left, both push price UP (not down as stated).

Hence, Option 4: (B), (C) and (D) only -> When analyzing simultaneous shifts, we need to identify which variable (price or quantity) moves definitively in one direction versus which remains ambiguous. Statement (A) incorrectly states price decreases when demand shifts right and supply shifts left—both these shifts actually push price upward, making the price increase definite, not decrease. Statements (B), (C), and (D) correctly identify the definite direction of one variable while acknowledging the ambiguous nature of the other -> correct