Questions

OTT stands for 'Over-The-Top' is a term in media industry for the delivery of film and TV content via internet. It doen't require any users to subscribe to a traditional cable or satellite pay TV service.

Examples for OTT players include Netflix and Amazon Prime.

According to Forbes, the Russian capital Moscow currently boasts an unprecedented 84 billionaries. Between them, the Moscow billionaries share a total of $366 billion. 

Polypeptides are assembled from Aminoacids.

Groundwater is all the water that has penetrated the earth's surface and is found in one of two soil layers. The one nearest the surface is the "zone of aeration", where gaps between soil are filled with both air and water. Below this layer is the "zone of saturation", where the gaps are filled with water.

The order may vary from compiler to compiler.

Here the multiplication will happen before the addition , but in which order the functions would be called is undefined. In an arithmetic expression the parentheses tell the compiler which operands go with which operators but do not force the compiler to evaluate everything within the parentheses first.

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.