Assertion: There are many alternative therapies such as yoga, meditation, acupuncture, herbal remedies and so on.
Reasoning: Alternative therapies are so called, because they are alternative treatment possibilities to the conventional drug treatment or psychotherapy.

Both Assertion (A) and reasoning (R) are correct and R is the correct explanation of A.

The correct answer is option 1: Both Assertion (A) and reasoning (R) are correct and R is the correct explanation of A.

Assertion: There are many alternative therapies such as yoga, meditation, acupuncture, herbal remedies and so on. True — This is a factual statement listing examples of alternative therapies.
Reasoning: Alternative therapies are so called, because they are alternative treatment possibilities to the conventional drug treatment or psychotherapy. Also true — This explains why these therapies are called "alternative" — because they differ from conventional medical or psychological treatments.

Now, let's consider if the reasoning correctly explains the assertion. The assertion lists examples of alternative therapies, and the reasoning provides the definition of why these and other practices are classified as "alternative." The fact that yoga, meditation, acupuncture, and herbal remedies are considered alternative therapies is because they offer different approaches to health and well-being compared to conventional medical treatments.

Therefore, the reasoning accurately explains why the examples provided in the assertion fall under the category of alternative therapies.