OPENMAT Question:
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Bats can sense obstacles because they produce
(1) Supersonic sound waves
(2) Ultrasonic sound waves
(3) Infrasonic sound waves
(4) Micro sound waves

Answer:

(2) Ultrasonic sound waves

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The first Indian ruler who accepted Subsidiary Alliance
offered by Lord Wellesley in 1798
was
(1) Nawab of Oudh
(2) Nizam of Hyderabad
(3) Nawab of Carnatic
(4) King of Mysore		Which of these is a modified underground stem
(1) Radish
(2) Carrot
(3) Sweet potato
(4) Potato