Answer: A) Masazo Nonaka Explanation: According to Guiness World Records, the world's oldest living man Masazo Nonaka has turned 113 years on 25 July of 2018 in Japan's Hokkaido.     Francisco Nunez Olivera was the former oldest person who died on 29th of January 2018 at the age of 112 years.   Les Colley (1898 - 1998, Australia), is the oldest ever man to father a child. He had his ninth child a son named Oswald to his third wife at the age of 92 years 10 months.

रेपो दर वह दर है जिस पर भारतीय रिजर्व बैंक देश में वाणिज्यिक बैंकों से धन उधार लेता है। यह वह दर है जिस पर भारत के वाणिज्यिक बैंक भारतीय रिज़र्व बैंक के साथ अपना अतिरिक्त पैसा आमतौर पर अल्पावधि के लिए पार्क करते हैं।

Answer: A) Corona Explanation: The outermost layer of the sun is called The Corona.   The inner layers are the Core, Radiative Zone and Convection Zone. The outer layers are the Photosphere, the Chromosphere, the Transition Region and the Corona. IRIS will focus its investigation on the Chromosphere and Transition Region.

Answer: D) 144 min Explanation: Let the slower pipe alone fill the tank in x min. Then, faster pipe will fill it in x/3 min. 1/x + 3/x = 1/36  4/x = 1/36 => x = 144 min.