Assertion (A): Malpighian capsule completely separates the waste material from the nutrients present in the bloodstream.
Reason (R): Selective reabsorption, secretion and transportation of urine are the functions of renal tubule.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Assertion (A):** The assertion states that the Malpighian capsule (also known as the Bowman's capsule) completely separates waste material from nutrients in the bloodstream. This is a claim about the function of the Malpighian capsule in the kidney.

2. **Analyzing the Assertion:** The Malpighian capsule is part of the nephron in the kidney where filtration occurs. During this process, both waste materials and some nutrients (like glucose and amino acids) are filtered from the blood. Therefore, the assertion that it "completely separates" waste from nutrients is incorrect because some nutrients do pass into the capsule along with waste products.

3. **Understanding the Reason (R):** The reason states that selective reabsorption, secretion, and transportation of urine are the functions of the renal tubule.

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