Assertion: All minerals are ore.
Reason: Ores are minerals from which metal can be extracted conveniently and economically.

Options

A. If both (A) and ( R) are correct and ( R) is the correct explanation of (A).
B. If both (A) and ( R) are correct, but ( R) is not the correct explanation of (A).
C. If (A) is correct, but ( R) is incorrect.
D. If (A) is incorrect, but ( R) is correct.

Explanation

To analyze the assertion and reason provided in the question, we can break down the solution into the following steps:

### Step 1: Understand the Assertion
The assertion states that "All minerals are ore." We need to evaluate whether this statement is true or false.

**Hint:** Consider the definitions of minerals and ores.

### Step 2: Understand the Reason
The reason states that "Ores are minerals from which metal can be extracted conveniently and economically." We need to determine if this statement is true or false.

**Hint:** Reflect on the characteristics of ores and their relationship to minerals.

### Step 3: Analyze the Relationship
We know that:
- All ores are indeed minerals.
- However, not all minerals qualify as ores. Only those minerals from which metals can be extracted conveniently and economically are classified as ores.

**Hint:** Think about examples of minerals that are not ores.

### Step 4: Conclusion on Assertion and Reason
From our analysis:
- The assertion "All minerals are ore" is **false**.
- The reason "Ores are minerals from which metal can be extracted conveniently and economically" is **true**.

**Hint:** Compare the truth values of both statements to determine the correct option.

### Step 5: Determine the Correct Option
Given that the assertion is incorrect and the reason is correct, we can conclude that the correct option is:
- "If A is incorrect, but R is correct."

**Hint:** Review the options provided to confirm your choice.

### Final Answer
The correct conclusion is that the assertion is false, and the reason is true. Therefore, the correct answer is that the assertion is incorrect, but the reason is correct.

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