The following are the statements regarding "Universal tooth brush".
i. Itis a muscular sense organ.
ii. A fold of tissue which attaches it to the floor of the oral cavity is called gingiva.
iii. It heps in mixing saliva with food and deglutition.
iv. It also helps in taste detection and speaking.
Which of the above are correct?

Options

A. All
B. All except II
C. I,II and IV only
D. II and lll only

Answer

To determine which statements about the "Universal Toothbrush" (the human tongue) are correct, we will analyze each statement one by one.

1. **Statement i: It is a muscular sense organ.**
- The tongue is indeed a muscular organ composed of muscle tissue, and it functions as a sense organ for taste. Therefore, this statement is **correct**.

2. **Statement ii: A fold of tissue which attaches it to the floor of the oral cavity is called gingiva.**
- This statement is **incorrect**. The fold of tissue that attaches the tongue to the floor of the mouth is called the **frenulum**, not gingiva. Gingiva refers to the gums that surround the teeth.

3. **Statement iii: It helps in mixing saliva with food and deglutition.**
- This statement is **correct**. The tongue plays a crucial role in mixing food with saliva to form a bolus, which is essential for swallowing (deglutition).

4. **Statement iv: It also helps in taste detection and speaking.**
- This statement is also **correct**. The tongue contains taste buds that are responsible for detecting different tastes, and it is essential for articulation and speech.

**Conclusion:**
- The correct statements are:
- i (correct)
- iii (correct)
- iv (correct)
- The incorrect statement is:
- ii (incorrect)

Thus, the correct statements are i, iii, and iv.

### Summary of Correct Statements:
- i, iii, and iv are correct.