Which of the following is the earliest recorded multiple arch buttress dam?

Which of the following is the earliest recorded multiple arch buttress dam? Correct Answer Meer Alam dam in India

The Coolidge dam on San Carlos River in Arizona is a multiple dome-type dam having a height of 76.2 m with buttresses @ 54.8 m apart. The Rodriguez dam in Mexico is the highest deck slab type dam having a height of 73.2 m. The Idduki dam is a concrete double curvature parabolic thin arch dam.

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The most economical central angle of the arch rings of an arch dam can be adopted only at one place preferably at mid-height in an arch dam is of the type __________________