Answer: B) Benjamin Franklin Explanation: Benjamin Franklin has long been credited with the invention of bifocal lenses and he was the first to wear bifocal lenses. He did not produce them himself but instead had some optician in London or France make them for him to overcome Presbyopia, a condition that Franklin suffered. He was tired switching between lenses for far and near sightedness. And that resulted in inventing Bifocal Lenses.

Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. And, water is called the "universal solvent" because it dissolves more substances than any other liquid It means that wherever water goes, either through the ground or through our bodies, it takes along valuable chemicals, minerals, and nutrients

Answer: D) F1M3K Explanation: From the given information, F1M → F is the wife of MM3K → M is the father of KTherefore, F is the mother of K.

Answer: B) 23 Explanation: Calculating Age has 2 conditions. Let your Birthday is on January 1st. 1. If the month in which you are born is completed in the present year i.e, your birthday, then Your Age = Present year - Year you are born  As of now, present year = 2018 i.e, Age = 2018 - 1995 = 23 years.   2. If the month in which you are born is not completed in the present year i.e, your birthday, then Your Age = Last year - Year you are born As of now, present year = 2018 i.e, Age = 2017 - 1995 = 22 years.

Answer: A) Element Explanation: The simplest form of matter that has a unique set of properties and is cannot be broken down into simpler substances by chemical means is called an Element.   An Atom is the simplest form of an element. The simplest form of some elements is a Molecule. When an element consists of two identical atoms it is called a diatomic molecule. A substance that contains two or more elements chemically combined in a fixed proportion is called a Compound.

Answer: B) Shubhangi Swaroop Explanation: Shubhangi Swaroop, the First Woman Pilot inducted into Indian Navy.

Answer: C) Lima Explanation: Lima is the Capital of Peru and its Currency is Sol.