India-born Sundar Pichai is the Chief Executive Officer (CEO) of which of the following companies?

Oparin's theory about 'Origin of life' is related to

A and B can complete a task in 20 days, B and C can complete it in 30 days while C and A can do the same task together in 24 days. How many days will each of and C take to complete the task individually? 

Which Indian economist wrote the 2017 book 'I Do What I Do'? 

Assuming that the numbers in each of the following figures follow a similar pattern, select the option that can replace the question mark (?) in figure C.

Which of the following is necessary to maintain the number of individuals of species and to prevent their extinction?

Nitin ranks 23rd from the top in a class of 42. What will be his rank from the last?

Which of the following gases makes bread or cake rise making them soft and spongy?