Consider the following three statements (A - C) and choose the correct option tow fill the blanks :-
(A) .....helps to stop substance from leaking cross a tissue .
(B) In all connective tissue except, ....the cells secrete fibres .
(C) ..... cell produce and secrete fibrea in connective tissue

Options

A. A= gap junction, B = cartilage , C = macrophase
B. A = tight junction , B= Bones , C= Fibroblast
C. A = tight junction , B= Blood ,C = Fibroblast
D. A = Desmosomes , B= Blood , C = Mast cells

Answer

To solve the question, we need to fill in the blanks in the statements (A - C) with the correct terms related to connective tissue and its functions.

### Step-by-Step Solution:

1. **Analyzing Statement A:**
- The statement is: "..... helps to stop substances from leaking across a tissue."
- The correct term that fits here is **"tight junction."**
- **Explanation:** Tight junctions are specialized connections between adjacent cells that prevent the passage of materials between them, effectively sealing the tissue.

2. **Analyzing Statement B:**
- The statement is: "In all connective tissue except, .... the cells secrete fibers."
- The correct term that fits here is **"blood."**
- **Explanation:** While most connective tissues have cells that secrete fibers, blood is an exception as it is a fluid connective tissue and does not have cells that secrete fibers.

3. **Analyzing Statement C:**
- The statement is: "..... cells produce and secrete fibers in connective tissue."
- The correct term that fits here is **"fibroblasts."**
- **Explanation:** Fibroblasts are the primary cells in connective tissue responsible for producing and secreting the extracellular matrix, including fibers like collagen and elastin.

### Final Answers:
- A: Tight junction
- B: Blood
- C: Fibroblasts