The Taj Mahal is often described as a "dream in marble". Which of the following monuments in India is popularly referred to as a "dream in stone"?

Introduction / Context:
Indian monuments are sometimes given poetic descriptions that highlight their beauty and the material from which they are built. The Taj Mahal is famously called a dream in marble because of its white marble construction and delicate beauty. Similarly, another important monument is often called a dream in stone. This question checks whether the learner can match this phrase to the correct monument.

Given Data / Assumptions:

• The question mentions the phrase dream in stone.

• It links this phrase with the practice of describing the Taj Mahal as a dream in marble.

• Several Indian monuments are provided as options, such as Red Fort and Bahai temple.

• Only one monument is traditionally connected with the phrase dream in stone.

Concept / Approach:
The Red Fort in Delhi, built of red sandstone, is often referred to as a dream in stone. The phrase contrasts with the Taj Mahal, where marble is the main material. The approach is to recall this pairing and recognise that the poetic language has become a standard part of general knowledge questions. It helps to connect red sandstone construction with the idea of stone in the phrase.

Step-by-Step Solution:
Step 1: Note that the question first reminds us that the Taj Mahal is called a dream in marble. Step 2: Remember that another famous Mughal era monument in Delhi, the Red Fort, is built primarily of red sandstone. Step 3: Recognise that this fort has been romantically described as a dream in stone. Step 4: Examine the options and find the Red Fort among them. Step 5: Conclude that the correct answer is the Red Fort and select that option.

Verification / Alternative check:
Standard Indian history and general knowledge books that cover important monuments often mention these nicknames. The Taj Mahal as a dream in marble and the Red Fort as a dream in stone appear together in many exam oriented compilations. Referring to such books or reliable educational websites confirms this association and shows that other monuments do not share that specific phrase.

Why Other Options Are Wrong:
The Rang Mahal and Panch Mahal are architectural structures that may be parts of larger complexes but are not widely known by this nickname. The Bahai temple, also known as the Lotus Temple, is famous for its lotus like design in white material but is not described as a dream in stone. Gol Gumbaz is a significant monument in Karnataka, noted for its dome, yet it does not carry this particular poetic label. Hence, these options do not match the traditional description.

Common Pitfalls:
Learners may confuse the phrase with other poetic descriptions, especially if they only vaguely remember something about marble or stone. Another pitfall is to think that the Bahai temple shares the same stylistic praise because of its striking beauty. To avoid confusion, it is helpful to memorise these phrase pairs clearly: Taj Mahal as dream in marble and Red Fort as dream in stone.

Final Answer:
The monument popularly referred to as a dream in stone is the Red Fort.