निम्नलिखित में से कौन से परीक्षण/अध्ययन शेयर बाजार की दक्षता के कमजोर-रूप (weak-form) के परीक्षण से संबंधित हैं? (A) घटना अध्ययन (Event studies) (B) आकार प्रभाव (Size effect) (C) रन परीक्षण (Runs test) (D) मूल्य-अर्जन (P/E) अनुपात (E) स्व-सहसंबंध परीक्षण (Autocorrelation tests) नीचे दिए गए विकल्पों में से सही उत्तर चुनें:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Systematic risk cannot be eliminated through portfolio diversification. Reason (R): Systematic risk arises due to macroeconomic factors that affect the entire market. In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): A high operating leverage indicates that a small change in sales can produce a larger percentage change in EBIT. Reason (R): High operating leverage arises because of the presence of higher fixed operating costs in the cost structure. In the light of the above statements, choose the most appropriate answer from the options given below: