Which of the following combinations of theorems and their subjects are correctly matched?
(A) Modigliani - Miller theorem : Price of goods and real return to factor
(B) Dorfman - Steiner theorem : Advertisement expenditure
(C) Arrow's impossibility theorem : Social choice
(D) Stolper - Samuelson theorem : Capital structure
(E) Fisher's separation theorem : Profit maximization motivation
Choose the correct answer from the options given below:

Correct option is D

Correct Option: 4. (B), (C), (E) 
Explanation:

• (A) Modigliani–Miller theorem : Price of goods and real return to factor
  Incorrect — Modigliani–Miller theorem is about capital structure irrelevance, not prices/returns to factors.
  
• (B) Dorfman–Steiner theorem : Advertisement expenditure
  Correct — It gives the optimal advertising-to-sales ratio.
  
• (C) Arrow’s impossibility theorem : Social choice
  Correct — About voting systems and social welfare functions.
  
• (D) Stolper–Samuelson theorem : Capital structure
  Incorrect — Stolper–Samuelson is about international trade and income distribution (effect on factor prices), not capital structure.
  
• (E) Fisher’s separation theorem : Profit maximisation motivation
  Correct — Says that under perfect capital markets, firms’ investment decisions are separate from owners’ consumption preferences, and the goal is to maximize present value (profit).