Recently, our scientists have discovered a new and distinct species of banana plant which attains a height of about 11 metres and has orange-coloured fruit pulp. In which part of India has it been discovered?

The correct answer is Andaman Islands.

This question is based on a remarkable botanical discovery from India's biodiversity-rich island territories. Let us understand the context and reasoning step by step.

What was discovered?
Scientists discovered a new and distinct species of banana plant with two highly unusual characteristics:

1. It attains an extraordinary height of about 11 metres — making it exceptionally tall compared to most cultivated banana varieties, which typically grow between 3 to 6 metres.
2. Its fruit pulp is orange-coloured — a very rare trait, since common banana pulp is white or cream-yellow in colour.

These two features together — towering height and distinctly orange pulp — made it stand out as a completely new species, unlike any previously catalogued banana plant in the world.

Where was it discovered — and why the Andaman Islands?
The Andaman and Nicobar Islands represent one of India's most ecologically isolated and biodiversity-rich regions. Located in the Bay of Bengal, these islands are geographically separated from the Indian mainland, which means they have evolved unique flora and fauna found nowhere else on Earth. This phenomenon is known as endemism — species that are native and restricted to a particular geographic location.

Because of their tropical, humid, and relatively undisturbed forest ecosystems, the Andaman Islands regularly yield new species discoveries in botany and zoology. The isolation of island ecosystems accelerates evolutionary divergence, making it highly plausible for an entirely new banana species with such distinct traits to have developed there undetected.

This newly discovered banana species was identified in the Andaman Islands and later classified scientifically, adding to the rich inventory of endemic plant species of that region. It serves as a reminder of how much of India's island biodiversity remains unexplored.

Why the other options are incorrect:
- Anamalai Forests (Tamil Nadu/Kerala): A well-studied biodiversity hotspot in the Western Ghats, but this specific banana species was not discovered here.
- Maikala Hills (Central India, Chhattisgarh/Madhya Pradesh): A forested highland region, but not associated with this discovery.
- Tropical rain forests of northeast India: The northeast is indeed a major centre of wild banana diversity (genus Musa), and many wild banana species are found there — making this a plausible distractor. However, this particular species with orange pulp and 11-metre height was specifically recorded from the Andaman Islands, not the northeast.

Key Takeaway:
The Andaman Islands, due to their tropical insularity and ecological uniqueness, were the site of this exciting botanical discovery — a banana plant (Musa species) standing about 11 metres tall with striking orange-coloured fruit pulp, representing a species new to science. This underscores the immense and still-being-uncovered biodiversity value of India's island ecosystems.