Introduction:
The Qutub Minar is a prominent monument located in Delhi, India. It is known for its historical significance and architectural grandeur. In this question, we are asked to identify the appropriate adjective to describe the Qutub Minar.

Explanation:
The Qutub Minar is a _______ monument.

To answer this question, we need to analyze the characteristics of the Qutub Minar and choose the most suitable adjective.

Tall:
The correct answer for this question is option 'B' - tall.

Reasoning:
1. Height:
- The Qutub Minar is renowned for its towering height.
- It stands at a height of 73 meters (240 feet).
- The monument is the tallest brick minaret in the world.
- Its height and unique design make it an impressive structure.

2. Architecture:
- The Qutub Minar is built in Indo-Islamic architectural style.
- It consists of five distinct storeys, each marked with intricately carved balconies and pillars.
- The minaret tapers towards the top, creating a visually appealing structure.

3. Historical Significance:
- The Qutub Minar was built in the 12th century by Qutub-ud-din Aibak, the founder of the Delhi Sultanate.
- It was constructed as a victory tower to celebrate the Muslim dominance in Delhi.
- The monument is a UNESCO World Heritage Site and attracts numerous visitors from around the world.

Conclusion:
Based on the aforementioned points, it is evident that the Qutub Minar is a tall monument. Its towering height, distinct architecture, and historical significance make it an iconic structure in India.