Find out the wrong statement

Options

A. Organ of corti is located on the tectorial membrane
B. The membranous semi-circular canals of internal ear are suspended in the perilymph of the bony canals
C. At the posterior pole of the lateral to the blind spot, there is a yellowish pigmented spot called marcula lutea with a central pit called the fovea
D. Along with the hypothalamus, the limbic system is involved in the regulation of sexual behaviour, expression of emotional reactions and motivation.

Explanation

To find the wrong statement among the provided options, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- The statement claims that the organ of Corti is located on the tectorial membrane.
- **Correction:** The organ of Corti is actually located on the basilar membrane, not the tectorial membrane.
- **Conclusion:** This statement is incorrect.

2. **Analyze the Second Statement:**
- The statement mentions that the membranous semicircular canals of the internal ear are suspended in the perilymph of the bony canal.
- **Explanation:** The membranous semicircular canals (also known as the membranous labyrinth) are indeed suspended in the perilymph, which is the fluid found in the bony labyrinth.
- **Conclusion:** This statement is correct.

3. **Analyze the Third Statement:**
- The statement refers to a yellowish pigment spot at the posterior pole, lateral to the blind spot, called the macula lutea, with a central pit known as the fovea.
- **Explanation:** The macula lutea is indeed located at the posterior pole of the eye, and the fovea is the central pit within it. The blind spot corresponds to the optic disc where there are no photoreceptors.
- **Conclusion:** This statement is correct.

4. **Analyze the Fourth Statement:**
- The statement discusses the limbic system's role in regulating sexual behavior, emotional reactions, and motivation.
- **Explanation:** The limbic system is indeed involved in emotional responses and behaviors necessary for survival, including sexual behavior and motivation.
- **Conclusion:** This statement is correct.

### Final Conclusion:
After analyzing all the statements, the first statement is identified as the wrong one. Therefore, the answer is:

**Answer: The first statement is the wrong one.**