Answer: B) Prashant Ranganathan Explanation: An Indian boy has won the world’s largest pre-college science competition in the US in the environmental engineering category for his project on biodegradation of pesticides. Prashant Ranganathan, a 12th grader from Jamshedpur, alongwith over 20 high school students from various parts of India, participated in the Intel International Science and Engineering Fair.

Answer: B) The Press and news paper Explanation: Thomas Carlyle attributed the origin of the term to Edmund Burke, who used it in a parliamentary debate in 1787 on the opening up of press reporting of the House of Commons of Great Britain.

A microwave. Generally when you run a microwave for '99' it runs for 1 minute and 39 seconds. '100' runs for 1 minute.

The purpose of the Preamble is to clarify 1. who has made the Constitution,2. what is the ultimate sanction behind it,3. what are its goals and objectives,4. what is its source (and) 5. what is the nature of the polity which is sought to be established by the Constitution.Actually, the preamble is the opening statement to the United States Constitution.   The words in the Preamble ::  'We the people of India, in our Constituent Assembly, do hereby adopt, enact and give to ourselves this Constitution'.

Answer: B) 24 kmph Explanation: Average speed=total distance/total timeLet distance to store be  Kthen, total time =(K/20)+(K/30)=K/12and, total time =(2K)so average speed= 2K / (K/12) = 24kmph.

The population is the smallest unit of living organisms that can undergo evolution.

Answer: C) Operating system Explanation: In a brief, the system software is the interface between the hardware and user applications. System software is a type of computer program that is designed to run a computer’s hardware and application programs.   Examples : OS, System utilities, BIOS like mouse, keyboard, hard disc, Device drivers, Assembler,...

Answer: C) 49% Explanation: