Correct Answer: P

Solution : Given:
1. P and R do not learn Spanish.
2. S learns French.
3. P does not learn German.
Make the table format for the person and the language they learn.
The order will be –

So, P learns the English language. Hence, the third option is correct.

Correct Answer: Erich Huckel

Solution : The correct option is Erich Huckel.

German scientist and physicist Erich Huckel put up a theory in 1931 to assist in identifying whether an aromatic property would be present in a planar ring molecule. According to his rule, an aromatic, cyclic, planar molecule possesses 4n+2 electrons. Hückel's Rule is the name given to this principle.

Correct Answer: RPQS

Solution : The correct choice is the fourth option.

The context helps identify that the paragraph is about the German invasion of the countries and northern France. Thus, to state the information provided chronologically, we follow the below steps:

• The paragraph starts with sentence R, which states that on May 10, 1940, the attack by Germans began with the capture by parachutists of key bridges that were deep in the country so that they could open a way for mobile ground forces.
• It is followed by sentence P, which tells the reaction of the Dutch defenders who fell back westwards, and by noon on May 12, German tanks were on the outskirts of Rotterdam.
• It is followed by sentence Q, which gives further information that the then-queen Wilhelmina and her government left the country on May 13, followed by the surrender of the Dutch army on May 13.
• The concluding statement of the paragraph is sentence S, which provides additional information on the invasion of Belgium, which also began on May 10.

Correct Answer: 1866

Solution : The correct option is 1866.

The German biologist Ernst Haeckel was the first to characterise ecology as a distinct branch of study in 1866. Greek terms "oikos", which means "house" or "environment", and "logos", which means "study" or "science", were combined by Haeckel to create the word "ecology". With an emphasis on the connectivity of living things and their surroundings, he defined ecology as the study of the interactions between organisms and their environment.

Correct Answer: Hermann Kolbe

Solution : The correct option is Hermann Kolbe.

The German chemist who used the technique of preparing hydrocarbons by electrolysis of solutions of salts of fatty acids was Hermann Kolbe. He made significant contributions to the field of organic chemistry, and his work on electrolysis paved the way for the synthesis of organic compounds from inorganic precursors. This process, known as Kolbe electrolysis, demonstrated that organic molecules could be created from inorganic sources, challenging the then-prevailing theory of vitalism in chemistry.

Correct Answer: Neither I nor II follows

Solution : According to the above-given statement –
Conclusion I: No other countries have the best engineers.
In the above statement, it has not been mentioned that only German engineering is considered the best in the world. As such, this conclusion is incorrect.
Conclusion II: Engineers from other countries are catching up with German engineers nowadays.
The above statement does not state that other countries' engineers are trying to be on an equal platform as German engineers. As such, this conclusion is also incorrect.

Therefore, the correct answer is neither conclusion I nor conclusion II. Hence, the fourth option is correct.

Correct Answer: Hermann Kolbe

Solution : The correct answer is Hermann Kolbe.

In 1845, the German chemist Hermann Kolbe published a method for the synthesis of acetic acid, a natural product containing two carbon atoms. This work by Kolbe was a significant contribution to the understanding of organic chemistry and marked a key advancement in the synthesis of organic compounds.