Explanation: The question pertains to the longest-serving Chief Minister of Karnataka, a state in India. To understand this, it is essential to delve into the political history of Karnataka and the tenures of its Chief Ministers.
D Devaraja Urs, a prominent figure in Karnataka's political landscape, served as the Chief Minister for a total of 11 years and 10 months. His tenure was not continuous but spanned two separate terms. The first term was from 1956 to 1962, and the second term was from 1972 to 1974. Urs was a member of the Indian National Congress (INC) and played a significant role in the state's political development during his time in office.
RamaKrishna Hegde, another notable Chief Minister, served for a total of 7 years and 10 months. His tenure was significant, but it does not match the length of Urs's tenure. Hegde was known for his contributions to the state's development and his role in the Janata Party.
S M Krishna, who served as the Chief Minister for 5 years and 10 months, is another important figure in Karnataka's political history. However, his tenure is shorter than that of D Devaraja Urs. Krishna was a member of the Indian National Congress and made significant contributions to the state during his time in office.
B S Yeddurappa, who served for 3 years and 10 months, is also a significant political figure in Karnataka. However, his tenure is much shorter than that of D Devaraja Urs. Yeddurappa was a member of the Bharatiya Janata Party (BJP) and played a role in the state's political landscape.
In summary, D Devaraja Urs holds the record for the longest-serving Chief Minister of Karnataka, with a total tenure of 11 years and 10 months. This tenure spans two separate terms and is a testament to his significant role in the state's political history. Understanding the tenures of different Chief Ministers is crucial for comprehending the political dynamics and development of Karnataka over the years.