Questions

Opportunity cost is the cost of other alternative choices for making your interested choice of work. Oppurtunity cost is also called as alternative cost.

For example on a holiday, you have two choices to do, either you can go to movie or a function. And if you chose to go to moavie, the oppurtunity cost of going to movie is the value that would have gotten if you had gone to function.

The law of increasing opportunity costs states that as you increase production of one good, the opportunity cost to produce an additional good will increase.

Isotopes are variations of an element that have the same charge as the original element, but a different mass, which is caused by either more/less neutrons in the nucleus.

Code coverage is a measure used to describe the degree to which the source code of a program is executed when a particular test suite runs.

With YouTube Analytics, you can track metrics on Playback locations. Playback locations gives you how many views your channel got and what videos they watched. 

With YouTube Analytics we can Find out who's watching, what they like to watch, and which videos could make you the most money.

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Ans. D.
Solution: In the given sentences banking upon is the correct phrasal verb which means basing hopes on someone/something or depending on someone for something.
Option D is incorrect because the bank does not have any relevant meaning in the given context.