Select the Venn Diagram that best represents the relationship between the following classes.
Male, Doctors, singers

Two places P and Q are 92 km apart. A train leaves P for Q and at the same time another train leaves Q for P. Both the trains meet 4 hrs after they start moving. If the train travelling from P to Q travels 7 km/hr faster than the other train, find the speed of the two trains.

Two trains of equal length take 10 seconds and 15 seconds respectively to cross a telegraph post. If the length of each train be 120 meters, in what time (in seconds) will they cross each other traveling in opposite direction? 

When was the San Francisco Conference?

Directions: In question four alternatives are given for the Idiom/Phrase underlined in the sentences. Choose the alternative which best expresses the meaning of the Idiom/Phrase and mark it is the Answer Sheet.

His performance is remarkable. Let us hope it does not turn out to be a flash in the pan.

In each of the following questions, sentences are given with blanks to be filled in with an appropriate word (s). Four alternatives are suggested for each question. Choose the correct alternative out of the four and indicate your choice for the correct answer.

I congratulated him ______ his promotion.