Which are true about the following statements about kangaroo rats
(a) They have dark colour, high rate of reproduction and excrete solide urine
(b) They do not drink water, breathe at slow rate, and have their body covered with thick hair
(c) The feed on dry seeds and do not require drinking water
(d) They excrete very concentrated urine and do not use water to regulate body temperature

Options

A. II and III
B. III and I
C. I and II
D. III and IV

Answer

To determine which statements about kangaroo rats are true, let's analyze each statement step by step.

### Step 1: Analyze Statement (a)
**Statement (a):** They have dark color, high rate of reproduction, and excrete solid urine.
- **Analysis:** Kangaroo rats do not excrete solid urine; instead, they excrete very concentrated urine. Therefore, this statement is **false**.

### Step 2: Analyze Statement (b)
**Statement (b):** They do not drink water, breathe at a slow rate, and have their body covered with thick hair.
- **Analysis:** It is true that kangaroo rats do not drink water, but they do not breathe at a slow rate as suggested. They are adapted to their environment and have a relatively normal breathing rate. Thus, this statement is **partially true** but overall **false** due to the breathing rate claim.

### Step 3: Analyze Statement (c)
**Statement (c):** They feed on dry seeds and do not require drinking water.
- **Analysis:** This statement is **true**. Kangaroo rats primarily eat dry seeds and obtain sufficient water from the metabolic oxidation of these seeds, so they do not require drinking water.

### Step 4: Analyze Statement (d)
**Statement (d):** They excrete very concentrated urine and do not use water to regulate body temperature.
- **Analysis:** This statement is also **true**. Kangaroo rats have long loops of Henle in their kidneys, allowing them to excrete very concentrated urine. Additionally, they do not use water to regulate body temperature as they live in burrows and are nocturnal.

### Conclusion
Based on the analysis:
- Statement (a) is false.
- Statement (b) is false.
- Statement (c) is true.
- Statement (d) is true.

Thus, the correct answer is that statements **(c)** and **(d)** are true.

### Final Answer
The true statements about kangaroo rats are:
- (c) They feed on dry seeds and do not require drinking water.
- (d) They excrete very concentrated urine and do not use water to regulate body temperature.