[A]: Conjunctiva is composed of squamous epithelium and is continuous with the dermis that lines the eyelids.
[R]: The conjunctjva is thick highly cornified and richly supplied with free nerve endings.

Options

A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false

Answer

To analyze the statements regarding the conjunctiva, we will break down the assertion and reasoning step by step:

### Step 1: Understanding the Assertion
- **Assertion (A)**: "Conjunctiva is composed of squamous epithelium and is continuous with the dermis that lines the eyelids."
- The conjunctiva is indeed a membrane that lines the eyelids and covers the sclera of the eye. However, it is not composed of simple squamous epithelium. Instead, it is made up of stratified squamous epithelium, which provides a protective barrier.

### Step 2: Evaluating the Composition
- The conjunctiva is a stratified epithelium, which means it has multiple layers of cells. This is important for protection against mechanical damage and pathogens. Therefore, the assertion that it is composed of squamous epithelium is incorrect.

### Step 3: Understanding the Reasoning
- **Reason (R)**: "The conjunctiva is thick, highly cornified, and richly supplied with free nerve endings."
- The conjunctiva is not thick; it is relatively thin. It is not highly cornified either, as cornification refers to the process of keratinization, which is more characteristic of skin rather than the conjunctiva.

### Step 4: Evaluating the Nerve Supply
- The conjunctiva is indeed richly supplied with free nerve endings, which is true. This nerve supply is crucial for the sensory function of the eye, as it helps detect irritants and initiate reflex actions like blinking.

### Step 5: Conclusion
- Both the assertion and the reasoning contain inaccuracies. The assertion is false because the conjunctiva is not composed of squamous epithelium but rather stratified squamous epithelium. The reasoning is also false because the conjunctiva is not thick or highly cornified; it is thin and has a rich supply of nerve endings.

### Final Answer
- Both the assertion (A) and reasoning (R) are false.

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