The first compound to be prepared in the laboratory was Urea.

Introduction:
The discovery of urea is significant in the field of chemistry as it was the first organic compound to be synthesized in the laboratory. This breakthrough in the synthesis of organic compounds paved the way for further advancements in the field of chemistry.

Discovery of Urea:
Urea was first synthesized by Friedrich Wöhler in 1828. During that time, it was believed that organic compounds could only be derived from living organisms, as they were thought to possess a vital force that couldn't be replicated in the laboratory. However, Wöhler's success in synthesizing urea shattered this belief and demonstrated that organic compounds could be artificially prepared.

Synthesis of Urea:
Wöhler prepared urea by reacting silver cyanate (AgCNO) with ammonium chloride (NH4Cl). The reaction resulted in the formation of urea (NH2CONH2) and silver chloride (AgCl). This synthesis proved that an organic compound could be prepared from inorganic substances.

Significance of the Discovery:
Wöhler's synthesis of urea had several significant implications:

1. Disproved Vitalism: The discovery of urea challenged the concept of vitalism, which held that organic compounds could only be produced by living organisms. This breakthrough paved the way for the development of organic chemistry as a separate branch of science.

2. Artificial Synthesis of Organic Compounds: Wöhler's success in synthesizing urea demonstrated that organic compounds could be artificially prepared in the laboratory, opening up new possibilities for chemical synthesis.

3. Foundation for Organic Chemistry: The synthesis of urea marked the beginning of synthetic organic chemistry. This discovery encouraged scientists to study and synthesize various organic compounds, leading to the development of numerous branches within organic chemistry.

4. Impact on Agriculture: Urea is an essential component of fertilizers, and its synthesis in the laboratory provided a means to produce large quantities of this compound for agricultural purposes. This significantly contributed to the growth of modern agriculture.

Conclusion:
In conclusion, urea was the first organic compound to be synthesized in the laboratory. Friedrich Wöhler's discovery of urea not only disproved the concept of vitalism but also laid the foundation for the development of synthetic organic chemistry. This breakthrough has had a profound impact on various fields, including agriculture, and has revolutionized our understanding of organic compounds.

Its urea, which is prepared by friedrich in 1828.option D is correct