Trigonometrical Survey Start and Completion

The question asks to identify the individuals responsible for starting and completing the Trigonometrical Survey. Let's analyze the historical context.

Understanding the Great Trigonometrical Survey

The Great Trigonometrical Survey of India was a monumental project initiated in the early 19th century. Its primary goal was to accurately map the Indian subcontinent using scientific surveying techniques.

Key Figures in the Survey

• Starting the Survey: The survey was initiated by Lieutenant William Lambton in 1802. He oversaw the initial phases and laid the foundation for this extensive project.
• Completing the Survey: After Lambton's death, the survey continued under various superintendents. Sir George Everest took over as Surveyor General in 1830 and played a crucial role in its completion. The survey was finally completed in 1871, well after Everest's tenure, but he is credited with overseeing its most significant and final stages.

Analysis of Options

Based on historical records:

• William Lambton started the Great Trigonometrical Survey.
• George Everest is credited with overseeing and completing significant portions of the survey.

Therefore, the correct pair is Lambton and Everest.

Conclusion

The Great Trigonometrical Survey was started by William Lambton and effectively completed under the significant direction and supervision of Sir George Everest. This corresponds to the second option provided.