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 for statements A, B, and C based on our knowledge of biology, specifically connective tissues and their characteristics.

### Step-by-Step Solution:

1. **Analyzing Statement A:**
- The statement is: ".....helps to stop substances from leaking across a tissue."
- In biology, tight junctions are specialized connections between cells that prevent the leakage of substances between them. Therefore, the correct term to fill in the blank for statement A is **"tight junction."**

2. **Analyzing Statement B:**
- The statement is: "In all connective tissue except, ....the cells secrete fibers."
- Among connective tissues, blood is a type that does not secrete fibers. While other connective tissues like bone, cartilage, and loose connective tissues do have cells that secrete fibers, blood does not. Thus, the correct term to fill in the blank for statement B is **"blood."**

3. **Analyzing Statement C:**
- The statement is: "..... cell produce and secrete fibers in connective tissue."
- The primary cells responsible for producing and secreting fibers in connective tissue are fibroblasts. Therefore, the correct term to fill in the blank for statement C is **"fibroblast."**

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

### Summary of the Correct Option:
- A: Tight junction
- B: Blood
- C: Fibroblast