Answer: A) Bangalore Explanation: Bengaluru has became the second city in the country, and the first in south India, to have a full-fledged Metro rail in operation following the opening of a final 12-km section of the 42-km first phase of the Metro project. The first phase, comprising an 18-km east-west line and a 24-km north-south line, built at a cost of Rs 13,845 crore, was dedicated to the nation by President Pranab Mukherjee at an event in Bengaluru.

Answer: D) California Explanation: The US state California's  economy has surpassed that of the UK to become the world’s fifth largest, according to new federal data released.   With a GDP of $2.7 trillion, California is now only behind the US, China, Japan and Germany.

Answer: A) SBI Bank Explanation: State Bank of India, the country’s largest public sector bank, has launched a unified integrated app called YONO (You Need Only One) that would offer all kinds of financial and lifestyle products.

Answer: C) Donald Trump Explanation: Prime Minister Narendra Modi has emerged as the most followed world leader on photo-sharing app Instagram with a whopping 6.9 million followers, surpassing US President Donald Trump.

Answer: C) Leaves Explanation: Cactus spines are also known as modified bud scales, which are also called modified leaves.   Cactus spines occur in clusters in the axil of leaves.

Answer: C) Haryana Explanation: Teams of the National Aeronautics and Space Administration (NASA) of the United States and the Indian Space Research Organisation (ISRO) would inspect the excavation being carried out at an archaeological site in Haryana’s Fatehabad district to verify claims of it being the oldest civilisation in the world. Archaeologists have recovered artefacts pre-dating the Harappan Civilisation from the site, located in village Kunal in Fatehabad district.

Answer: D) Levon Aronian Explanation:

Answer: C) Mesosphere Explanation: The mesosphere lies above the stratosphere and extends to an altitude of about 85 km. This is layer is often referred to as the cold layer, as the lowest readings in the atmosphere are found here.   Temperature decreases with height, reaching a minimum average value of -90 ºC at the top of the layer.