Which of the following famous valleys in India is poetically described as the "Paradise on Earth" because of its scenic beauty?

Introduction / Context:
Some regions of India are known by poetic nicknames that highlight their natural beauty. One of the most famous of these is the phrase Paradise on Earth, originally applied to a valley surrounded by snow capped mountains, lakes and gardens. This question tests whether the learner can correctly associate this phrase with the right valley in India.

Given Data / Assumptions:

• The question mentions a famous valley referred to as Paradise on Earth.

• The options list several well known valleys in northern India.

• The learner must choose which valley matches this poetic description.

• We assume basic familiarity with Indian geography and tourism slogans.

Concept / Approach:
The Kashmir Valley in Jammu and Kashmir is widely known as Paradise on Earth. Its lush meadows, lakes such as Dal and Nigeen, and surrounding Himalayan scenery have inspired this label in literature, tourism and popular culture. The correct approach is to recognise that this phrase is most strongly associated with Kashmir rather than other Himalayan valleys.

Step-by-Step Solution:
Step 1: Note the phrase Paradise on Earth and understand that it refers to a place of exceptional natural beauty. Step 2: Recall that the Kashmir Valley has long been described in this way in poetry, travel writing and tourist promotions. Step 3: Compare this association with the options Kullu, Doon, Kangra, Kashmir and Zanskar Valleys. Step 4: Recognise that while Kullu, Doon, Kangra and Zanskar are also scenic, they do not enjoy the same famous nickname to the same extent. Step 5: Select Kashmir Valley as the correct answer.

Verification / Alternative check:
Tourism brochures, geography textbooks and general knowledge compilations frequently describe Kashmir as Paradise on Earth. Historical and literary references by travellers and poets also compare the valley to a garden or paradise because of its climate and landscapes. These consistent descriptions across diverse sources confirm that the phrase is firmly attached to the Kashmir Valley.

Why Other Options Are Wrong:
Kullu Valley in Himachal Pradesh is famous for its apple orchards and river scenery, but it is not traditionally given the Paradise on Earth title in standard GK references. Doon Valley, which includes Dehradun, is important but is more associated with educational institutions and as a gateway to hill stations. Kangra Valley is known for tea gardens and temples, while Zanskar Valley is recognised for its stark high altitude beauty and trekking routes. None of these valleys has the same widely recognised poetic nickname as Kashmir.

Common Pitfalls:
Learners may be tempted to choose any Himalayan valley, assuming that all of them are equally likely to carry such a nickname. Another pitfall is to confuse tourism slogans from different regions if they have not been systematically revised. To prevent this, it is helpful to make a short list of famous descriptive phrases, including Kashmir as Paradise on Earth, and revise them together before an exam.

Final Answer:
The valley poetically described as Paradise on Earth is the Kashmir Valley.