The correct sequence of arrangements of segments in the leg of cockroach is
(a) Trochanter, cox a, femur, tibia, tarsus
(b) Coxa, trochanter, femur, tibia, tarsus
(c) Coxa, femur, trochanter, tibia, tarsus
(d) Trochanter, femur, coxa, tibia, tarsus

Options

A. Trochanter, cox a, femur, tibia, tarsus
B. Coxa, trochanter, femur, tibia, tarsus
C. Coxa, femur, trochanter, tibia, tarsus
D. Trochanter, femur, coxa, tibia, tarsus

Answer

To determine the correct sequence of arrangements of segments in the leg of a cockroach, we need to understand the anatomy of the cockroach leg. The leg consists of five main segments arranged in a specific order. Here’s the step-by-step solution:

### Step-by-Step Solution:

1. **Identify the Segments**: The cockroach leg has five segments: coxa, trochanter, femur, tibia, and tarsus.

2. **Understand the Order**: The correct order of these segments is:
- **Coxa**: This is the first segment that connects the leg to the body.
- **Trochanter**: This is the second segment and acts like a knee joint.
- **Femur**: This is the third and the longest segment of the leg.
- **Tibia**: This is the fourth segment, which is typically long and slender.
- **Tarsus**: This is the fifth segment, which is further divided into smaller parts called tarsomeres.

3. **Analyze the Options**:
- **Option (a)**: Trochanter, coxa, femur, tibia, tarsus - Incorrect (starts with trochanter).
- **Option (b)**: Coxa, trochanter, femur, tibia, tarsus - Correct (follows the proper order).
- **Option (c)**: Coxa, femur, trochanter, tibia, tarsus - Incorrect (places femur before trochanter).
- **Option (d)**: Trochanter, femur, coxa, tibia, tarsus - Incorrect (starts with trochanter and misplaces coxa).

4. **Conclusion**: The correct sequence of arrangements of segments in the leg of a cockroach is given in **Option (b)**: Coxa, trochanter, femur, tibia, tarsus.

### Final Answer:
**(b) Coxa, trochanter, femur, tibia, tarsus**