Vasa efferentia in male frog opens into

Options

A. Vas deferens
B. Bidder's canal
C. Cloaca
D. Urinogenital duct

Explanation

### Step-by-Step Solution:

1. **Understanding the Male Reproductive System of Frogs**:
- The male reproductive system of frogs consists of several components, including the testes, vasa efferentia, Bidder's canal, seminal vesicles, and ureters.

2. **Location of the Testes**:
- In frogs, the testes are oval-shaped, yellow-colored structures located on the upper surface of the kidneys. Each frog has a pair of testes.

3. **Function of the Testes**:
- The testes contain seminiferous tubules where sperm synthesis occurs.

4. **Pathway of Sperm**:
- Once sperm is produced in the seminiferous tubules, it enters a structure called the rete testis.

5. **Vasa Efferentia**:
- The rete testis connects to 10 to 12 tubular structures known as vasa efferentia. These vasa efferentia transport sperm away from the testes.

6. **Connection to Bidder's Canal**:
- The vasa efferentia open into a canal located inside the kidney, known as Bidder's canal.

7. **Final Pathway**:
- From Bidder's canal, sperm moves into the seminal vesicles and then into the ureter, which in male frogs is referred to as the urinogenital duct.

8. **Conclusion**:
- Therefore, the vasa efferentia in male frogs open into Bidder's canal.

### Final Answer:
**Vasa efferentia in male frog opens into Bidder's canal.**

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